Shizuka Kanno, who plays the daughter-in-law, has a long and erotic tongue! This is not a tongue fetish film, but in the scene where she is urged by her father-in-law to feed him porridge and then they move on to kissing, her long tongue swells and entangles like a slug, making it incredibly erotic. In order to cheer up the daughter-in-law, who is sexually frustrated because of her husband's impotence, her elderly father-in-law takes the lead and leads her to sex, but instead she aggressively Tsukushi and devours the old man in such an erotic way that the old man is full of energy and gets aroused, which is a highlight of the film!