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Takizawa bumps into his old classmate Ren at his new job, and childhood memories of school come flooding back.

Takizawa bumps into an old classmate, but Ren doesn't want them to meet again, which leads Takizawa to feelings of confusion.

Takizawa and Ren start their friends-with-benefits relationship, but Takizawa still wants to know what happened ten years ago.

Ren starts to help a coworker investigate an internal case of sexual assault at the company. At the same time, he runs into someone he never thought he would see again.

Ren meets Takizawa's mother by accident, and their conversation makes Ren feel the pain of the past once again.