Chapter Text
“Wakasa, these are your snacks for tonight.” Tatsumi handed the merman the bag of lollipops he promised a few days earlier.
“Ah, thank you, Tatsumi.” Wakasa carefully placed the bag next to the bath so that the contents wouldn’t get wet – even though the lollipops were wrapped too.
“You can’t finish these all tonight, okay?” The human wanted to be sure he wouldn’t have to buy more food the next day. A merman really was living an expensive life.
“I know!” Wakasa smiled. “Or else you’ll get mad, right?”
Tatsumi nodded. “That’s right, I’ll get really angry.” He turned to leave the bathroom. “Well then, I’ll be studying in my room, so don’t disturb me.”
“Okay~”
Tatsumi closed the door to his room. Now that he was alone, he could feel his legs tremble and his heart was bumping in his chest. For a moment, he let himself slide down against his door to catch his breath. Dealing with the merman wasn’t something he was getting used to. Not at all.
Tatsumi looked at the clock. It was only a little past nine, so too early to go to sleep yet. He had told Wakasa that he would be studying, but little did the merman know that tomorrow would be a rare day of for the high school student. There was no reason to study and Tatsumi wasn’t planning either.
Calmly breathing, he slowly undressed himself before lying on his bed on his back. Ever since Wakasa had moved into his bathtub, Tatsumi hadn’t stopped thinking about the merman. To the dark haired human, everything about the other was mesmerizing. Dealing with Wakasa was a pain and a blessing, and Tatsumi couldn’t get enough of him. The baths were a little awkward though, with the blond taking up so much space, leaving almost no room for Tatsumi to wash himself. But that too, he didn’t mind.
Pulling himself out of his Wakasa-centered daydream, Tatsumi observed his current problem. If he really was irritated by it, he’d sigh, but in reality, he wasn’t. He’d have to deal with it one way or another and taking a shower probably wouldn’t help. Especially not with Wakasa in the same room.
Swiftly, Tatsumi pulled off his own underwear, exposing his hard dick to the coolness of his room. In a way, Tatsumi was glad it was dark already, because even when he was alone, masturbating really was embarrassing. He hadn’t even done anything yet and he was already panting.
“Damn you, Wakasa, for getting me like this.” He whispered to himself. Even with two doors between them, Tatsumi was afraid the merman would still hear him.
With one hand, he grabbed his dick and started stroking it, at first softly, but using more strength the more time went by. Tatsumi was in no hurry and he sure acted like that.
Pumping, stroking, pushing, he did everything while only thinking about the creature residing in his bath.
Was it his hair? No. Was it his tail? No again. His personality then? That part of him could use some improvement according to Tatsumi.
His eyes. Tatsumi could see them clearly in his mind. They were shining on their own, beautifully blue, like some shallow parts of the sea, those closest to the shore just before the sand got visible beneath the water. Tatsumi would never admit it, but if someone would ask him to what he actually was masturbating, he’d have to admit it was to Wakasa’s eyes. Their brightness exceeded everything.
Tatsumi’s dick was fully hard now. He knew it would have less effect if he did it himself, but thinking about Wakasa, he couldn’t stop himself anymore. While his right hand pumped his length, his other hand reached for a nipple and he started pulling it. Like his dick, it was already kinda hard and he pulled on it a few times to increase the sensitiveness of it before he switched hands and did the same to his other nipple too. It felt nice, though not great. Doing it by himself really didn’t give the wanted effect after all.
The excitement ran through his whole body. Without Tatsumi realizing it himself, he’d pushed his knees up in the air, so that his feet were almost touching his naked ass on the sides. Everything in the lower part of his body was throbbing, so Tatsumi switched again with his hands, but his left hand stayed almost in the same place. Much to his own embarrassment, there was already spilling quite some precum and his left hand was covered in it.
He knew how gay sex worked. For a moment he wondered if he actually ever would be able to have sex with Wakasa, not knowing if mermen had dicks and/or assholes or not, but that would be of later concern.
Fast enough, Tatsumi noticed he wasn’t able to reach his own entrance easily the way he touched it now, so because of that, he moved his feet under his ass cheeks, making them rest on his ankles. This way, it was easier for his fingers to reach their destination from beneath Tatsumi.
At this moment, Tatsumi was actually really happy he had taken a bath just before giving the needy merman his snacks. Feeling himself up felt weird, but at least he knew it was completely clean down there. After touching his entrance and rubbing around it, he slowly let a finger slip in.
Given that he had come this far only one time before, Tatsumi gasped at the sensation. Forgetting everything else for a while, even his other hand and his hard dick, he could only think about what was happening inside him. When he finally thought he’d gotten used to it, he moved that finger very slowly at the beginning and speeding up the more he got used to it.
It took a while before Tatsumi felt confident enough to add a second finger. Now, he moved those fingers both in the same, but also in the opposite direction. The scissoring movement made Tatsumi’s body move on its own. He couldn’t help it, his lower body was moving up and down his fingers. Before long, a third finger was added and his forgotten hand found his dick again.
Up and down. Up and down.
Tatsumi was drooling from pleasure, but he didn’t feel it. He was sweating, but he didn’t notice. His breath was getting really loud, but he didn’t care anymore. All that went through his head were those eyes.
“Tatsumi.”
For a second, Tatsumi believed he could even hear the merman call his name, which was obviously ridiculous, as the blond knew the human had to concentrate on his studies.
“Tatsumi.” It sounded louder and yet, he didn’t pay much attention to it, blaming his own state of being. He was close now, he could feel it. Only a few more seconds left before he could climax.
Suddenly, his door flew wide open, revealing a panicking blond merman.
“Tatsumi! Are you sick? I heard you brea-” Wakasa started, but fell silent at the sight in front of him. Unfortunately for Tatsumi, everything between his legs was clearly visible to the merman, who had crawled down the hallway and was now lying on the ground, staring at what Tatsumi was doing.
“Tatsumi?” He brought out with much effort.
“Go… away…” Tatsumi had even more trouble talking. His erection was calling for his attention as much as the piercing eyes pointed at it.
“Are you okay, Tatsumi? Do you need any help?” Wakasa came closer, dragging himself over the floor.
“Go away!” The human hissed at the other.
“I-I can’t.” Wakasa stumbled over his words. He had reached the bed, his eyes never looking away from Tatsumi.
If Tatsumi had a third hand, he’d cover his face in pure embarrassment, and if he had to fourth, he’d push the merman away. But that was all impossible.
Wakasa pushed his upper body on the bed, his slimy body wetting the sheets on top of it. He didn’t say anything, just grabbed Tatsumi’s left wrist and with no warning, pulled his hand away from his ass. That place felt really empty all of a sudden and he gasped. Wakasa, on the other hand, didn’t wait for Tatsumi to recover from that and slicked in a finger of his own. He probably felt how lose Tatsumi’s entrance already was, as he quickly added a second and a third finger. Tatsumi couldn’t figure out of the merman was skilled or not, but whatever the blond did, it felt amazing.
“Tatsumi.” Wakasa whispered to the other, driving him crazy with that and the slimy fingers moving inside of him. “Tatsumi, let me.”
But he couldn’t hold it anymore. He came more than he ever did before, probably because of Wakasa finishing the job. In the end, he had barely touched his dick anymore, the merman’s presence alone almost was enough to make him come.
Tatsumi took a minute to catch his breath and slowly a thought crept up in his head. When he had regained some strength, he pushed up his head to look at Wakasa, who, too, was lying on the bed, though he appeared to be unconscious.
Tatsumi could hit himself – and Wakasa too in the process – for forgetting how much Wakasa actually needed water. Right now, the merman was dying.
It took a lot of effort, but eventually, Tatsumi was able to stand on his feet properly. With no second to spare, he gently put his own arms under Wakasa’s and pulled him back to the bathroom like that. The moment Wakasa hit the water, his eyes flashed open, revealing the light blue Tatsumi loved so much.
“Tatsumi?” He looked at the dark haired human. “You’re dirty, you should take a bath.”
Tatsumi looked at his own body for the first time. His chest was covered in white semen and if he dared to look at his face in the mirror, he could probably say he looked like hell.
He sighed. “That’s alright, I’ll take a quick shower.” No way he would let himself in the same bath as Wakasa after what happened.
Wakasa pouted, but didn’t complain anymore. Instead, he grabbed a lollipop Tatsumi had given him earlier and started licking it. It looked so damn erotic that Tatsumi had to look away so that he wouldn’t get hard again.
His shower only lasted two minutes and the whole time, Tatsumi faced the wall, ignoring the other being present. After he’d finished, he dried himself off quickly. His underwear was still in his room, resulting in the decision to leave the bathroom naked.
“Goodnight, Wakasa.”
The mermaid noticed the lack of suffixes, telling him Tatsumi wasn’t angry at him for what he did. “Goodnight, Tatsumi!” He beamed at Tatsumi’s back.
Tatsumi sighed when he closed the bathroom door behind him. Maybe it would be a good idea to find out if mermen had dicks too.