A playboy high school boy's first love is an older teacher! Frivolous high school boy Kaede Ochiai is an enormous playboy! His next target is Tsukiko Hashimoto, a neat female teacher... so she pretends. The truth is that she's completely unkempt. It started as a bet that he could have sex with master Tsukiko for 10 000 Yen. She treats him like a child; she has a boyfriend; there is no way he can ever seduce her right!? Along the way he ends up becoming more and more interested in this teacher...?