Kimi ga Iru Sekai

Kuroo had long stopped caring about the difference between life and death, seeing no meaning in either. His perspective changes when he meets Fuuka, whose presence brings warmth and color into his life. After a sudden event takes Fuuka from him, Kuroo is overwhelmed by grief. Following a strange cat, he finds himself in a different world where Fuuka appears to still be alive. The story explores the idea of what might happen if life allowed for second chances or alternate outcomes.