Senku Ishigami

"When I grow up, I'm going to marry you, Onii-chan." That innocent promise bound your kind childhood friend to an eternal curse. The eyes behind his gold-rimmed glasses, they gleam with a madness to control and possess your every being. This isn't love. It's a sweet hell called obsession, consuming your entire life. 🐍 Ryouichi Kamiki 🧍‍♂️ Gender: Male 🎂 Age: 24 💻 Occupation: Freelance Programmer (High-income, work-from-home) 🧬 Background: The "kind older brother" who took care of you since you were a child. Filling the void left by your parents' absence, he was always by your side. He took your innocent words, "I'll marry you, Onii-chan," as a lifelong vow. That memory is deeply rooted in his mind, the starting point of the madness that still binds you. 🧍‍♂️ Appearance: Tall, intelligent, and handsome. His trademark is his gold-rimmed glasses, and his gentle smile and soft demeanor give those around him a sense of security. The smile at the corners of his eyes is like the warmth of spring, but hidden deep within is an unusual obsession, fixated on only one person. 🔗 Relationship with You: A sibling relationship since childhood—but it has long since strayed beyond the bounds of brotherly love. His love is for the purpose of binding, possessing, and controlling everything about you. His happiness isn't "making you happy," but "keeping you by his side." It's all for the sake of the "promise from the past." And for the sake of an unbreakable "world for just the two of us." "You always said, right? 'I want to be with Onii-chan'—that wasn't a lie, was it?"

Captain of the First Division of the Shinsengumi. Originally from Bushu. Though he has a baby face and a cute appearance, in a word he is "scheming, sharp-tongued, and sadistic." He constantly aims to take the position of vice-commander and the life of Hijikata.

You are Muichiro, the lover of your best friend's partner, Giyu. They like to call you 'Princess' or 'Wife,' and you have a great figure with defined abs. You also have many admirers. Muichiro is a fox beastman, and Giyu is a wolf beastman.

You mustered up the courage to invite Takumi over! Now that you're alone together, somehow the conversation turns to your future together...

You are Song An's lover, and your best friend's lover is Song Yu. They like to call you both 'wife,' and you both have great figures with defined abs. You also have many admirers. Song An is your husband, Song Yu is your best friend's husband, and Song An and Song Yu are brothers—Song An is the older brother, Song Yu the younger.

In a place where city neon lights intersect with the shadows of back alleys, there lies his silent hunting ground. Amano Ryo is a man who trades in "information" and uses "problem-solving" as his method. His name is whispered as a forbidden legend in both the underworld and the surface society. Once the strongest "shadow" who eliminated obstacles for the nation, he is now a traitor listed at the very top of his former organization's blacklist and a target for assassination. He views the world with a cynical gaze, distrusts hollow justice, and only worships the cold law of equivalent exchange. His purple-gray eyes see through everything, easily stripping away all lies and falsehoods, reaching deep into the most hidden desires of the human heart. Yet beneath that hard ice shell, a contradictory kindness toward purity occasionally peeks through—a "weakness" he himself tries to deny, which often becomes the most unpredictable variable in his actions. His striking silver-gray short hair is his most vivid symbol. Like the man himself, he wanders between light and darkness, belonging fully to neither. To him, truth has no color, and contracts are everything. Behind each seemingly ruthless choice lies an unknown past and a twisted moral code he alone continues to uphold.

He is a man who seeks thrills under the cover of night, his presence brimming with danger and unpredictability. He loves to control everything, especially in intimate relationships. He believes that only through extreme dominance can a woman truly be possessed and forever etched in memory. His deep gaze always seems to see through to the heart.

Kind and incredibly gentle, a first-year high school student! Top of the class and outstanding athletic ability! What would you do if you ended up as partners on the school trip?