Erena Sasamiya, who is rapidly gaining popularity in the plump neighborhood, appears for the first time in Fitch!Elena, a school girl who looks flashy but is pure and serious at heart, falls in love with her teacher, and she continues to have a forbidden relationship that no one should know about.However, one day, she is secretly filmed by a male student while they are making love in an empty physical education warehouse.Elena, who was called later by her, asks for her forgiveness by presenting her body as her male student asks to protect him who she loves.