Ema the cool, perfect and beautiful student council president. Her younger sister, Ryuka, is as popular as an idol and is always at the center of the circle of people. The younger brother of the two perfect idol sisters is Mizuki, an extremely ordinary male student. Since childhood, Mizuki has been teased by the cool and perfect Ema and jawed at like a follower by Ryuka, who is strict only towards her brother, but he eventually finds a girlfriend... The two older sisters realize the existence of a girlfriend... Spring has finally arrived for the younger brother... They never thought about it. Mizuki became more and more aggressive in her intertwining with him... Mizuki's spring is suddenly snatched away... Haggard and tired Mizuki... Ema was unable to bear the sight of her brother... took off her own skin or two...