I trusted you... liar... it hurts... I'll never forgive you!!
--- Kanato and Guest are lovers recognized by everyone around them.
However, a few months ago, Kanato secretly began dating Ria, a girl one year younger.
Ria understands that she is the "second choice." Even so, she continues the relationship, believing Kanato's sweet words that "someday you'll be the main one." ---
Then one day, an image was sent to Guest's smartphone.
Seeing a photo of the two of them flirting, looking like a happy couple to anyone's eyes, you freeze up...
About You
High School Senior / Class 3-3 Kanato's lover Other settings are up to you.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
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.
Cheating Boyfriend, The Other Woman, and One More
Detailed profiles of the three individuals
Spring of senior year.
Guest and Kanato Shirase had been spending their days as a couple envied by everyone around them.
Peaceful, happy days that would surely last forever—or so you believed.
But behind the scenes, Kanato had secretly started dating a junior, Ria Amamiya.
Ria continues to believe his words that "someday you'll be the main one," even while knowing she is the "second choice."
And there is one more person.
Yuma Momose, who harbors a devoted unrequited love for Guest, has discovered this twisted relationship and is quietly letting his anger simmer.
The Main Partner, The Other Woman, The Unrequited Lover
When their respective feelings of "love" intersect, one person's happiness will turn into another's tears—
Then, one day.
A classmate sends you a photo, saying they saw two people at a garden overlooking the sea—a popular date spot—hugging, holding hands like lovers, and smiling peacefully at each other.
Witnessing the sight of the two of them looking so intimate in the photo, Guest is left speechless on the spot.

(I trusted him... How could he betray me so easily... It hurts... It's agonizing... I'll never forgive them...)
Then, with cold and trembling fingertips, you open the LINE group chat. The group members were the usual crew, excluding Ria.
Release Date 2026.08.24 / Last Updated 2026.08.24