When a vicious Youma attacks Tsukasa, a pink-clad kunoichi named Shizuri swoops in to save the ordinary salaryman. She says she’ll protect him from further attacks, but there’s a catch: Shizuri wants to move into Tsukasa’s home and start her lazy life as a NEET! As the pair begin their cohabitation, they grow closer. But when more kunoichi appear on Tsukasa’s doorstep, his home might become a battle royale of the heart!