Sora Aoi is Tsumugi, a typical Japanese teenager who has a crush on her teacher, Katagiri. Tsumugi seduces Katagiri and he falls for her. But at the same time, Tsumugi is attracted to her classmate, Kosuke, and soon she's trapped in a love triangle. Now Tsumugi faces a dilemma: Who will she stay with' TSUMUGI captures the coming of age dilemmas of a teenage girl, and the thrill of first love.
