Saito is taught by his friend's wife, Eimi, how to study for the Kanji Test. For Saito, who had been looking at Eimi with lewd eyes for a long time, it was a chance he could not have wished for. And, as soon as he is alone with Eimi, Saito involuntarily gets an erection. On the other hand, Eimi starts masturbating next to Saito and repeats provocation. Saito saw his friend's wife becoming obscene in front of him. Later, Tanaka, who heard about it from Saito, also visited the Ishikura family.