"Kai, ka ce kana son kanwa ko?" Toujo Basara, dalibin shekarar farko a makarantar sakandare, kwatsam mahaifinsa ya tambaye shi, ya fada cikin fargaba. A kan haka, uban mai ban mamaki ya ce masa zai sake yin aure. Daga nan sai ya tafi kasar waje bayan ya kawo Basara wasu ’yan uwa mata biyu kyawawa. Amma Mio da Maria ta gaskiya siffofin su ne a zahiri sabonbie Demon Ubangiji da succubus!? Basara ya kusa shiga kwangilar master da bawa da Mio, amma an kulla kwangilar "reverse" bisa kuskure, kuma Basara ya zama ubangidan!? Haka kuma, Basara yana fama da matsalar ecchi daya bayan daya saboda kwangilar, amma sauran aljannun aljanu da jarumai suna bin rayuwar Mio!! Wasan wasan kwaikwayo na sha'awar ɗan kwangila ya fara!
