Kyung-sik (Kim Yu-seok), who just returned home, has a busy day with his engagement with Yon-sook. I'm tired of seeing you sleeping hard. . Okbun (Seo Seung-hyun), who did not appear to his paternity Won-gyu (Lee Joon) and hovered only around him, has deepened his love for Won-gyu over time. Then one day, Okbun finds out the basics of being caught in a fight by the fertilization of other school students. . Meanwhile, Won-joon tries to take her home to introduce her to her mother, Kang, but Jung-ah refuses to do so. . (Source: SBS)