Susumu Hayashi, his twin brother Tsutomu, and Sakura Toyama shared a tight-knit bond since they were young, but this was put to the test when Tsutomu mysteriously disappeared at age ten. Two years later, he returned, but only in the reflection of a mirror visible to Susumu, leading to an unorthodox love triangle and unforeseen fallout for all involved. The series also features two standalone volumes: Lakeside and Playback.