Yuki Sakurai is an orphan living at the Asahi Orphanage, where he strives for independence. He has a mysterious ability: whenever he touches someone, he feels their emotions, sees the darkness within their hearts, and knows exactly what caused that darkness. Because he cannot control this power, Yuki often makes insensitive blunders while attempting to empathize with the people who hurt. Now, as death threats loom over him and his ability grows rapidly, he must confront a man claiming to be his older brother.