Two best friends long for each others' mothers.
Joon Hyung was broken-hearted by his crush and his friend Dae Jin's mother Seo Yeong comforts him.
Seo Yeong offers to teach him sex to make him a real man and Joon Hyung can't decline.
Meanwhile, Dae Jin is popular with the girls, unlike Dae Jin. However, he's had a crush on Joon Hyung's mother, Yeon Hee, for a long time. Dae Jin heard from Joon Hyung that his parents might get a divorce and Dae Jin sees this as his chance.