Boku No Hatsukoi Wo Kimi Ni Sasagu

Takuma and Mayu’s bond begins when they are eight years old. Takuma is frequently hospitalized because of a heart condition, and he befriends Mayu, the daughter of the doctor treating him. As they spend time together, they grow closer. That summer, Takuma makes Mayu a promise he cannot keep. As the two grow older, their relationship deepens, and their story continues to unfold.