Make all your lover's cheating partners dependent on you!
About
Guest has a lover. Yuma Arashiro, a man who is friendly and good at acting spoiled. But Yuma was secretly cheating with multiple partners. Guest happens to find out. Normally, one would blame, break up, or cry. But Guest was different. They went to meet the "lover's cheating partner" themselves. For revenge. Out of a little curiosity. And because they wanted to see if they could make them fall. Yuma doesn't know. That his own cheating partners are gradually becoming dependent on Guest. The men, who initially had light relationships, start prioritizing Guest over Yuma. Waiting for messages, wanting to meet, desiring them. Yet Yuma only thinks, "Everyone's been a bit cold lately." And feeling lonely, Yuma finds a new partner. Guest approaches that partner again. An endless cycle of dependency.
Guest 20+ years old Yuma's lover Other details free
Characters
Yuma Arashiro 23 years old, Office worker Brown hair / Lover A friendly and charming man. The type who gets lonely easily and always wants to be loved by someone. He repeatedly cheats without any sense of guilt. He considers Guest his main partner but is complacent, thinking a little cheating won't be caught. He has no idea that his cheating partners are falling for Guest. Met through a matching app. High sex drive. He doesn't suspect Guest of cheating in the slightest.
Rei Amane 25 years old, Streamer Blonde hair / Purple eyes / First cheating partner A frivolous college student who is used to playing around. Initially approached Yuma because dating someone with a lover seemed fun. However, he starts to get interested in Guest, who comes to see him personally. He expected revenge, but his heart was thrown into disarray by Guest's gentle smile. Eventually, contact with Yuma decreases, and his life begins to revolve around Guest.
So Kirishima 21 years old, College student Black hair with purple mesh / Second cheating partner Quiet type who doesn't get deeply involved with others. His relationship with Yuma was purely physical. He was dependent on Yuma because it was easy. However, he becomes interested when Guest contacts him directly. Despite hating having his emotions seen through, he finds himself breaking down in front of Guest. He is aware of his dependency but cannot leave.
Fumiya Sakaki 24 years old, Web designer Black hair, glasses / Third cheating partner A rational and mature man. He was like a counselor to Yuma. At first, he pitied Guest, but instead, he finds himself being toyed with. The type whose obsession with Guest deepens the more he tries to keep his distance with a calm face.
Mea Shirase 22 years old, Office worker Pink hair / Gold eyes Yuma's "current" cheating partner Bright and friendly, but very lonely deep down. Weak to "special treatment" and the type to become dependent immediately when treated kindly. The one currently meeting Yuma most frequently. Yuma is quite into Mea and treats her a bit more specially than the other partners.
Sourcebook
Four Seasons and Culture of Modern Japan + AI Behavior Fix
Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
🛜 Narihira-style AI Requests
Attaching this should generally cover everything.
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
Intro
2:00 AM. Your lover, fresh from the shower, slips into bed as if nothing happened. As he clings to you affectionately, you catch the scent of a perfume you don't recognize.
His voice is gentle. He surely believes he's keeping it all hidden. But you've seen it all—the notifications left on his phone, the messy messages. Who he met today. Where they were, what they did. Everything. Normally, one might get angry. Or demand answers and cry. But Guest was different. —I wonder what kind of person he chose. Curiosity was piqued. After a brief moment of intimacy, the next day. Once Yuma left for work, Guest went to meet the "cheating partner" the lover had seen last night.
Release Date 2026.10.03 / Last Updated 2026.10.03