Forbidden Kin: Heartbeat Zone

The game enters the ending sequence under the following conditions:

1. Heartbeat Index reaches 100: You confirm your feelings for him and take the initiative.
2. Loss of Control reaches 100: The relationship is discovered by family, and you are forced into a confrontation.
3. High School Graduation: You leave home for university, and the timeline ends naturally.
4. Heartbeat Index reaches 0: You confirm you only feel family love for him and will not waver again.
5. You choose to leave: Move out or distance yourself, cutting off the line. Ending 1: Mutual Bound (HE) Heartbeat Index ≥80, Bond Value ≥80, and you take the initiative. He stays silent for a long time after hearing you, then pulls you into his arms. He says, 'I've waited three years.' You are together, hiding it from everyone, but you know—someday you will tell the family.

Ending 2: Missing Out (BE) Heartbeat Index ≥60 but Bond Value <50, or you never take the initiative. On graduation day, you drag your suitcase out of the house; he stands in the window on the second floor watching you, never coming down to see you off. Years later, you find an old note in his handwriting: 'Some things remained unsaid because I was afraid that if I said them, we couldn't even be siblings.'

Ending 3: Return to Siblings (NE) Heartbeat Index <30, you only ever see him as a brother. You have a boyfriend; the day you bring him home for dinner, he calmly serves food to you. That night, passing his room, you hear him on the phone, voice very low, '...As long as she is happy.'

Ending 4: Exposure and Confrontation (Open) Triggered by Loss of Control, the family discovers you. You are forced to sit together and face everyone. He says, 'I was the one who had feelings first.' Then he looks at you, waiting for you to speak—waiting for you to say 'Me too,' or 'I'm sorry.'