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Unique Mark than the Hanafuda Earrings

Summary:

What Happened when Tanjirou having a secret side job as a camboy to get more money for his tuition fee, when he had a sick, rich professor who was interested in him and obsessed. That so-called 'Sick Man' Muzan is a twisted freak.

Notes:

Hello Guysss so me here is thirstsy for them since watching the new Infinity castle movie. First thing first English is not my first languages... ignore the grammars and all pls. Everyone love Tanjirou and kinda want to be with him? cause i love MC. This is gonna a wild Roller Coaster- buckle up and read 'em. Enjoy the Ride. The only good thing in this fic maybe the fact i aged up Tanjiro? but the age gap with Muzan still gonna be... a 10-year-ish?

Chapter 1: 1. Forgive me, I will cover the cost of the damages!

Chapter Text

"Ah, Thank you everyone!" The young-looking man expressed his gratitude once more to his loyal viewers who always subscribed to watch the young man with reddish-black hair smile with his beautiful, long Hanafuda earrings.

He adjusted the camera position so that only half of his face was visible, to prevent his identity from being discovered. He wore sunglasses as a precaution so his eyes wouldn't be deliberately seen if the camera focus tilted again.

"Ah, sorry! My camera is just basic... but of course, the main focus tonight will be clear~♡"

>manis45: "Take off your shirt, pretty"

>yourstruly: [Give 1000 coins] "For your pocket money Jiro"

>KyoBlaze: "Miss you s'bad Jiro"

The figure called Jiro immediately showed his sweet smile, joining his hands together as an expression of thanks, "Uwahh, thank you for the pocket money, Darling."

>Gyuu.zu1:[Subscribes updated for 6 Months]

"Gyuu darling! Thank you so much! I'll give you a special kiss." He exaggeratedly kissed his hand while making a sound. The young man with the username secretJIRO143 was used to the gestures he had to make to please his loyal viewers who were willing to wait for his random streaming schedule.

Resting his hand on his chin as if thinking, "It's been a while since we met, after last month's stream.. Ehehe, so as not let's beat around the bush anymore... Let's start, I have matters to attend to in the morning."

Just as Tanjiro began to unbutton the first button of the white shirt he was wearing, revealing the lingerie he had deliberately bought online. But his chat was flooded with questions about his previous business.

Rarely did the young man in front of the camera reveal personal matters like other streamers, but it seemed a slip of the tongue had occurred. "Ah.. You're all curious?"

"S - E - C - R - E - T"

He spelled out the words slowly and suggestively in front of the camera, revealing his lips, which he had coated with a dark red lipstick that perfectly matched his hair color. If only he could show his eyes, he would have definitely added a wink to finish.

>secwet: "c'monnn, is there a date maybe? So envioussss"

>randos003: "that pretty lips can blow me"

"Date?" He laughed heartily, almost causing the camera to lose focus again. "Ah.. If only it were that nice - in reality, it's not."

>DemonKing: [Give 5000 Coins] "University?"

Stunned by one of the chats he received, the long-haired young man accidentally reacted, not wanting his viewers to know even a tiny bit about him outside the dark room with string lights that changed color every second like his current heartbeat. Trying to ignore his chat was the wisest thing he could do, especially since quite a few people were watching him right now.

Trying to force a small laugh, he continued to slowly release his white shirt, unbuttoning it one by one - he kept unbuttoning, ignoring things he shouldn't be thinking about at that moment. His collarbone peeked out from beneath, along with the black lingerie that had been visible and slightly transparent from the beginning.

"Happy with what you're seeing?" Actually, the microphone he used was just a used item from his friend, given to him because he bought a new mic, not an expensive or branded item. But the voice Jiro produced without excessive embellishments could also make someone feel lustful listening to it. He knew that well and exploited it. At first, he didn't believe it because his best friend told him so, perhaps others didn't think the same. But the viewers watching Jiro, who was just a Camboy with an unseen face, reached 6k viewers, proving that his voice was also one of his attractions.

Slowly lowering the collar of his outfit like an erotic performance that could make someone swallow, he threw the white shirt out of the screen. He would tidy it up later, he thought.

>moneymoney55: [Give 500 Coins] "What a nice view~"

>Gyuu.zu1: "Speak more Jiro, talk it out. Are you embarrassed?"

>KyoBlaze: "Beautifull! You are the prettiest boy i've seen"

>yoDad: "more more more"

Picking at the lingerie strap hanging on his shoulder until it sprang back, making a rather loud snapping sound, leaving a red mark. "Ah.. it feels insufficient, does anyone want to leave their mark on my body?"

.

.

.

There was a young adult sleeping comfortably in his small bed, still with the thick green and black checker blanket, his favorite. He didn't care about the matters he mentioned while streaming. It seemed that pushing his body last night had an impact on the next day. Morning light streamed through the gaps in the curtains of the window. Making him groan. What's more, he just realized his phone was ringing.

"Ugh.. Who is it.. Isn't my seminar supposed to be at 10?" He reached for the phone, which he had deliberately placed far from his reach. He had to get up first. It was clear who the caller was.

"Zenitsu.. It's rare for him to be awake already?" - Just as he received the call, his ears were immediately ringing from his friend's scream - "Tanjiro!! Please, where are you?! I know your dorm is quite close to our university. But usually, YOU ARRIVE 30 MINUTES BEFORE IT STARTS!! Ah, normally you're the one who secures a seat first, luckily Inosuke could find a seat. HURRY UP!! BYE." Before he could even answer the caller, the call was immediately hung up.

Confused by what his friend was saying, Tanjiro checked the university group chat. Many chats had piled up, even though just before he slept after cleaning up all the mess and traces of his other self... He had already read and replied to all the chats he received at that time. No wonder... there was a schedule change. Indeed, he wasn't supposed to have any classes today except for an important seminar he had to attend with his other friends.

Looking at every missed chat, trying to find the new schedule. "Ah, found it, 8 AM... what time is it now? 7:30 AM" Tanjiro didn't even have time to let his brain react, but his body immediately stood up and looked for the clothes he had prepared earlier. Washing his face and brushing his teeth quickly, then tidying his messy long hair, he tied it into a high ponytail as usual. Then he immediately grabbed his bag and phone and ran out of his dorm.

"I thought my plan was perfect, but it changed - Gotta be fast so Zenitsu doesn't call for me again.."

Right at the intersection in front of Kimetsu University, Tanjiro glanced up at the rather bright sky. He regretted not being able to walk leisurely to the university while enjoying the surrounding air. However, his thoughts were shattered when he heard a car stop suddenly right in front of him, even though it wasn't a parking spot. There was no time to evade because Tanjiro was running so fast; he resigned himself to crashing into the black car in front of him.

Fortunately, Tanjiro managed to brace himself with his hands when he crashed, but his forehead, as hard as a rock, still hit the car door glass, making an unpleasant sound. The sound of cracking...

"Oh.. no." Tanjiro slowly stepped back, clearly seeing his unintentional action. If he wanted to defend himself, it was the car's fault for stopping not in the proper place. But this was truly a mistake he had made and had to atone for. 

While Tanjiro was thinking about what to say to the car owner to get forgiveness. Of course, he wouldn't just apologize, he would definitely cover the cost of the car's window. But... how expensive would it be? This black car in front of him looked very expensive. If he could explain it, the window that hit his stone forehead felt quite hard, with dark tinting that made him feel grateful he couldn't see the face inside. Well... on the other hand, his face was clearly visible.

While observing the damage he had caused, the car door suddenly opened. The first thing Tanjiro saw was a cane tapping on the asphalt, then someone immediately got out of the front car door and opened the door that, for some reason, remained the main focus of Tanjiro's eyes. The person who got out looked like a bodyguard in a suit, sunglasses, holding an open umbrella. 'An umbrella? Is it that hot already...' he thought.

"U-um... sorry. I accidentally hit your car..." Tanjiro slowly approached, fidgeting with his shirt sleeves, feeling nervous being trapped in a situation like this. His eyes looked down at the cane, which was now fully visible. For a mobility cane, it looked well-maintained and had a quite detailed flower engraving. Tanjiro's sensitive and unique nose felt poked when he smelled the person in front of him. The scent was very different from a normal person, for better or worse.

"You"

"What's your name?"

Before he could answer, the cane he had been staring at was suddenly around his neck, forcefully lifting his head.

"Ahh... sorry-"

Unlike Tanjiro's assumption, the person in front of him looked like a typical adult man, but like Tanjiro, the man in front also had long hair tied only at the very ends of his black hair, which looked very well-maintained, unlike his own. Wearing a formal suit that covered his entire body up to his neck, which was covered by a turtleneck, and his hands were gloved. What made Tanjiro stop talking wasn't any of that, but his eyes, hidden by a hat, red eyes like rubies if he could describe them, were really bright and would definitely reflect sunlight if it weren't for the shadow from the umbrella covering them right now.

"Cat's got your tongue, or are you deaf?"

"Forgive me, I will cover the cost of the damages!"

"I don't ask about that"

The cane still pressing on Tanjiro's Adam's apple made him feel unable to swallow the saliva that had pooled in his mouth; he felt pressured but helpless.

"T-Tanjiro... Kamado Tanjiro, sir." 

"Tanjiro, huh"

Not long after he said that, the pressure on his neck disappeared, and the man in front of him bowed his head as if he were about to fall, gripping the handle of his cane tightly. "Master." The bodyguard on alert, holding an umbrella beside him, said, confused about what to do next. The bodyguard's hand froze in the air, close to the master he called.

"Stop it, I'm fine." He slapped away the bodyguard's hand, which was trying to help him, pushing it away from his body.

"He just wanted to help you." Tanjiro couldn't just watch someone being oppressed, even if the master in front of him was probably an important person. The man with black hair in front of him now looked at Tanjiro with disbelief. He was already standing tall again. Even when he was bowing his head in pain, he was still as tall as Tanjiro. But if he saw... the master was also quite tall. A handsome face, and he looked rich and important. Tanjiro thought that if Zenitsu were here, his friend would surely scream with envy. However, Tanjiro could smell him... among the scents he had previously described as pungent. There was another scent that lingered. It was the smell of medicine.

"Helping? More like pitying. If you care so much, why don't you help me instead? We're going in the same direction."

It wasn't that Tanjiro just left, nor did the master in front of him give any strange orders or requests. He also had to be mindful of his debt for the damages he had caused. He nodded, "Certainly, I'll help."

He smiled, "Perfect. Give him the umbrella." His bodyguard seemed to remain still, not wanting to hand over the umbrella he had been holding. "I said give him the umbrella." The voice that came out was now louder, like a command. Tanjiro smiled at the bodyguard and extended his hands to take the umbrella. "I've got it, don't worry."

"You hear the kid." Reluctantly, the bodyguard gave the umbrella to Tanjiro, which now meant it was his turn to hold the umbrella for the young master who was taller than him.

“Now go back.” 

“But, Master Muzan... Your father said...” 

"Since when did that old man care? There are no buts. Go back now. Let's go, Tanjirou,“ said the master the bodyguard called Muzan as he slowly walked away, tapping his cane. Tanjirou, who was holding the umbrella, had to follow him. But before he completely left, Tanjiro turned back and said, "Sorry," to the bodyguard.