My friend's wife is a lewd tutor

Saito is taught to study for the kanji test by his friend's wife Eimi. For Saito, who had been looking at the beautiful and intelligent Eimi with lewd eyes, this was a chance he couldn't have hoped for. And as soon as he was alone with Eimi, Saito involuntarily got an erection. On the other hand, Eimi starts masturbating next to Saito, repeatedly provoking him by saying, ``I get horny when I'm studying...don't worry about it...''. Saito saw his friend's wife becoming lewd in front of him... Later, Tanaka hears about this from Saito and visits the Ishikura family.