Aitsu no Heart ni Hi wo Tsukero!

Kaduki Haruto runs away from his family, who are devoted to traditional Japanese court music, after discovering his passion for modern music. His family opposes any involvement with non-traditional genres, forcing him to leave everything behind. Alone and desperate, he finds himself singing in front of an apartment building, where he collapses from exhaustion.

Amamiya Keigo, a stranger, finds Kaduki and takes him in, caring for him like a stray cat. Kaduki begs to stay and work for Amamiya, who agrees. As Kaduki begins a new life, he must navigate the clash between his love for modern music and the expectations of his past, all while building an unexpected bond with his rescuer.