Rei, a teacher who cares for her students, is a bit of a natural airhead at the school, often forgetting to wear her bra and unconsciously pressing her breasts against others. Yuta, a student entering a sensitive period, finds it difficult to concentrate on his studies and his grades continue to decline due to Rei's actions. Seeing this, Rei, worried, makes an indecent proposal to Yuta when he comes for extra lessons one day...
