Her teacher is a pervert who loves swimsuits. He secretly installed a camera to secretly film students. And when he saw Takase Rina's body in a swimsuit, he was attracted to her.
Using the excuse of helping her learn to swim, he continuously used his dirty hands to touch Takase Rina's body.
Takase Rina also accidentally discovered his camera, but she didn't think he was the culprit and handed it over to him. Only when his actions became more and more outrageous towards her
