Smiling Killer summary: 「Is it wrong to kill a villain that the law can’t punish?」 Rintarou Saotome, a high school boy with the strange ability to see the final moments of others’ deaths. When Rintarou was just a child, the first death he witnessed was that of his beloved mother. Since then, he’s seen countless deaths, hundreds of them, and as a result, his heart became worn out. He began avoiding others and led a life of solitude. However, one day, a cheerful transfer student, Yumeno Sakurako, appears before him. But with his ability, Rintarou soon learns the truth. He discovers her other face. A boy who can see death × A girl who’s a killer. A psychological romantic comedy!!