Fifteen, kyosuke Kasuga, drops for Madoka Ayukawa and goes to a brand new city. She's friendly when they're alone, but behaves like a delinquent when in front of others. Kyosuke struggles not to violate the heart of Hikaru Hiyama, that fell in love after seeing him make an basketball shot that is impossible. To add the cherry with the specific sundae, Kyosuke and his family (sisters, grandfather, and cousins) all have various powers. And while Kyosuke's distressed to retain those forces a secret, his younger sisters (among others) aren't quite as concerned about it.