My wife, Iroha, ends up teaching my father-in-law, Kojiro, how to cook to his father-in-law, Kojiro, who has come to Tokyo to get his chef's qualification. - As he continues to teach, Kojiro's body touching increases, and Iroha feels her body flush in response. - Since she doesn't have any activities with her husband, she can't help it and starts masturbating in the bathroom, but Kojiro sees her doing it. - Iroha's crotch can no longer suppress the tingling from the intense and obscene sex that her husband doesn't have, and her body becomes more and more sensitive due to the endless humiliation of her father-in-law...