Arithmeim
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My Dear Girlfriends [HSR AU] by StevenXd999
Fandoms: 崩坏：星穹铁道 | Honkai: Star Rail (Video Game)
04 Feb 2026
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Caelus thought his biggest challenge at the Stellar Academy would be passing his Astronomy exams, but destiny trapped him in a chaotic orbit between the intensity of his childhood friend Cyrene, the mystery of the actress Castorice, and the tenderness of the brilliant engineer Firefly.
Unable to break their hearts, he decides to defy all logic and proposes the "Ternary System": an agreement of transparency and shared passion where the rules barely manage to contain jealousy and overflowing desire.
However, maintaining this delicate balance will be a monumental test of endurance, especially when his peculiar magnetism begins to transcend student boundaries, dangerously attracting the analytical gaze of the genius professor Herta and even the attention of the unreachable Idol Robin.
Can Caelus sustain this bridge of multiple loves without collapsing under the pressure, sleepless nights, and new variables threatening to add themselves to his equation?
Bookmarked by Arithmeim
24 Dec 2025
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The Emanator of Erudition and proud 83rd member of the Genius Society has solved many of the universe's mysteries, but she's never encountered a phenomenon quite like this: a Trailblazer that makes her pulse quicken and makes her thoughts scatter like stardust.
Armed with scientific methodology and her own pride, Herta approaches this new research subject like any other. After all, even matters of the heart can be quantified, analyzed, and solved.What she doesn't anticipate is that some mysteries solve themselves—and that the smartest person in the universe still has everything to learn about being human.
Bookmarked by Arithmeim
18 Dec 2025
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In an alternate timeline where the Astral Express chose Lushaka over Amphoreus, Herta faces the inevitable awakening of Irontomb—the entity destined to be the inverse of Erudition. As an Emanator, she alone can intervene, but the price is tragic: merging with Irontomb, becoming the very monster she despises.
In a life dedicated to the pursuit of knowledge, Caelus was the one thing she could never solve. Now, as she prepares to sacrifice herself, Herta must confront the one truth she always avoided: she loves him. And she's run out of time to say it.
Bookmarked by Arithmeim
02 Dec 2025
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Caelus and Herta had worked together numerous times before as they tested and experimented with the Simulated Universe, with Ruan Mei occasionally joining them. He would dive in while Herta and Ruan Mei would parse through the data that he collected. It was a comfortable routine for them.
That would all change though when they found a new, never before seen curio.
Bookmarked by Arithmeim
02 Dec 2025
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(Un)Healthy Obsession by SpiderSlayer42
Fandoms: 崩坏：星穹铁道 | Honkai: Star Rail (Video Game)
27 Jan 2026
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Sweet things always attracted insects, and nothing was sweeter than Caelus. Anywhere, anytime, these insects would come to him in swarms. Whether he liked it or not. It's such a shame, by the time he would realize what was going on it would already be too late.
Bookmarked by Arithmeim
02 Dec 2025