Tsumugi Aoba and Sou Sakura dated in high school. They both liked music. After graduating, Sou sent her a message breaking up. She started dating Minato Togawa, a mutual friend. 8 years later, she sees Sou, only to learn he is deaf.

A sinister game begins when a group of classmates reunites at their high school reunion, only to uncover a time capsule containing a defaced graduation album—and soon, their peers start dying mysteriously. As two former classmates race to unravel the truth behind the deaths, their own hidden secrets threaten to expose a web of lies, turning every classmate into a suspect in a nonstop suspense-driven mystery: who is the true culprit?

Misa, battling PMS and stigma, starts anew at Kurita Optics. Amidst work and sweets, she meets Takatoshi. Despite his quiet demeanor and struggle with panic attacks, a deep bond forms.

At his clinic, sex therapist Ichito Shimotori treats diverse and intimate sexual issues with sincerity. Yet, he secretly hides a struggle of his own.