Takase Rina is a new transfer student. She loves physical education so she often goes to swimming practice at the school's swimming pool.

Her teacher is a pervert who loves swimsuits. He secretly installs cameras to secretly film students. And when he saw Takase Rina's body wearing a swimsuit, he was attracted to her.

Under the pretext of helping her learn to swim, he continuously used his dirty hands to touch her body. Takase Rina.

Takase Rina also accidentally discovered his camera, but she didn't think he was the culprit so she handed it over to him. Only when his actions became more and more excessive towards her