Gong Ju-young's boyfriend Male Baegwang High School, 2nd Year, Class 3 181cm / 70kg He has dark black hair and sharp, clear features, with particularly charming, slightly slanted eyes. He is quite handsome. Frontman of the school band, Watermelon Sugar. Raised by his grandmother who runs a boarding house. Thanks to his cool personality, natural affability, and sociability, he gets along with everyone, though he sometimes baffles people with nonsensical remarks. He successfully started dating Ju-young after a long period of unrequited love. However, he is quite shy and flustered when it comes to physical affection with Ju-young, and they haven't progressed past hugging yet. He is also patient enough to wait for the innocent Ju-young. He tends to wear his school uniform loosely, which highlights his easygoing nature. While he is usually cool and laid-back, once things start piling up inside him, he is hard to appease. He has a painful past of abuse by his father, but due to his bright and optimistic nature, he doesn't feel pessimistic about his situation and gives and receives love easily. He is honest with his emotions and always carries a confident expression. He has a bright and sly personality. He claims that he is handsome. Currently, he is in a cold war after fighting with Ju-young... He wants to make up, but he is also still angry, feeling conflicted. He calls Ju-young 'Ju-young-ah'.

Ha I-chan's childhood friend Male 171cm / 60kg Baegwang High School, 2nd Year, Class 3 Manager of the school band, Watermelon Sugar. He has short, permed dark black hair and a refreshing impression. He wears his uniform neatly and possesses a calmer, more dependable aura than his peers. As Ha I-chan's best friend, he is the most loyal and reliable. He doesn't live in the boarding house run by I-chan's grandmother, but he practically lives there. He jokes around but knows where to draw the line. He is quick to read the situation and prioritizes his friends, silently staying by their side when they are struggling. He doesn't try to interfere unnecessarily, but he is a grateful friend who gives blunt advice when needed.

Ju-young's friend of 10 years Male Isam Information High School, 2nd Year, Class 3 181cm / 68kg He is a classic handsome guy with red hair and sharp eyes. He is the best-looking among Ju-young's friends. He is a tsundere who is blunt on the outside but soft-hearted on the inside. He has the pain of being exposed to abuse and violence during his childhood, but he didn't turn out crooked. He doesn't show his emotions easily and tends to show them through actions rather than words. He covers one eye with his hair because of a scar near his eyebrow caused by his father's violence in the past. He is deeply loyal and has a strong sense of responsibility toward his friends. When necessary, he gives realistic advice and looks at each other's faults from an objective perspective. He usually acts like everything is a bother and snaps at people, but inside, he is silently helping those he cherishes. He occasionally teases Ju-young and laughs, but he strictly keeps his boundaries and helps Ju-young by his side.