Nana, an orphan, receives a gifted education for killing. She had a gun before she even thought about it. She lived a life unrelated to the ordinary 16-year-old, but it changed completely due to Shimada's death poem. "If I died anyway, I wanted to be killed by a more cute woman." A "killer" who wants to be recognized as "kawaii" and "target" that you definitely don't want to admit to live. The strange cohabitation life of the killer and the target begins.