Chaoyang, whose husband is single and lives with his daughter and his wife.Recently, when I'm doing yoga due to lack of exercise, my girlfriend's son-in-law, Toshio, will also participate.Chaoyang who can't get his big dick out of his head.Her frustration builds up and she can't stand it and she makes him sleep at night.Chaoyang who continues to devour dekachi ○ port regardless of day and night.While being swept away by the foolishness, Toshio begins to drown in her mother-in-law's relentless temptation, and one day he can't live without her.