Mizuki has built an unhealthy relationship with Ema-nee, the beautiful and cool student council president. Emma She's determined that it's just for that long, but Mizuki's fierceness doesn't matter... in the school hallway. Whenever and wherever Ema is in the warehouse, Ema shows her uncontrollable and uncontrollable behavior, and without realizing He tells it, Ema accepts it and lets him out, before she realizes it, she gets lost in the immoral excitement and ends up cumming. , she comes to her senses and teases him like an older sister, however, the cloudy cum that had accumulated in the younger brother's pool was constantly trying to break free, and he raised his glans in search of his own body... Meanwhile, an important secret that had been casually hidden is revealed. The relationship between Ema and Mizuki changes drastically...