Good Mom's Friend 3

Twenty-year-old Soon-jae has a young mother named Ji-yoon that's like a sister to him. Right next door live a mother and son the same age as them; Ji-yoon's friend Yeong-joo and her twenty-year-old son Jae-yeong. The sons fall for each others' mothers.

Sun-young and Jun-young are living together. However, they have been unable to pay the rent for several months and listen to the pinzan from the landlord. Eventually, after worrying, he goes to Jun-young's father's house and asks for help. But there, the father's new lover, Ji-young, greets them. Sun-young and Jun-young are unable to borrow money and live in the house for the time being. But after that day. Jun-young's father Dae-woong's eyes keep seeing Sun-young's short mini skirt. Ji-young is interested in Jun-young, who is young and manly…

On his way to work, Sang-hyun accidentally meets his childhood friend Hyun-joo. They meet again soon, fall in love, and a few days later go to say hello to Hyun-joo's house. Hyun-joo's mother Hye-jin, whom Sang-hyun met there, was very young and beautiful. Sanghyun gradually falls into Hyejin's strong charm...

An erotic film about a mother and her son in-law.