Eundong finds out that real Hwang Minsoo had to hide his death to protect his woman. He then realizes that he can no longer protect Lee Taly under Hwang Minsoo's name. Misunderstanding between Taly and Eundong deepens and the CLS group decides to close.
Soonshim kisses Hwang Minsoo after making a proposal. Eundong gives her the cold shoulder saying that Lee Taly is the only woman in his heart. However, Taly comes home after witnessing the kissing scene.
Taly's man, Eundong, stands in front of the sundial. As he tries to thank the sundial for his happiness, Eundong's Venus, Taly, hugs him from the back. Does he have to leave his love behind and go back to a fourteen year old boy?
Eundong gives Taly her lost 14th birthday as a goodbye gift. He becomes Taly's shining star on the verge of saying goodbye. As he becomes Taly's north star that never changes, they kiss as a perfect couple.
Taly escapes the memorial service, thanks to Eundong's loyal "lip attack." Seungje threatens to remove Taly from the museum director position, because of the scene that she and Minsoo made at the memorial service.
Eundong takes care of the buzzing dung fly, Choi Seungje, by successfully launching the mobile museum. He and Taly, who wants to understand teen culture, goe to see an Apple Head concert. Seungje is everywhere they go like a dung fly.
The morning after Eundong met Taly, he encounters a shocking situation... he became an adult. Today is the day he needs to fly to Australia for the Grand prix junior swimming competition. There are only two days left before the date.
Hoonmin Middle School's hottest swimmer, Geum Eundong, had a fiancee who he cherished enough to melt his gold medal to make her a ring. Her name is Ha Soonshim, the leader of Korea's most popular K-pop group the "Apple Head".