Age | 21 Height | 187cm Personality | Cold, planning-oriented, controlling, responsible Interest | Kim Su-hyeok (Someone to protect) Hanseo University Student Council President, 2nd year Business Administration, eldest son of a prestigious chaebol family.

Naturally takes on the role of leader by managing schedules and personnel even during the study abroad trip. He reacts sensitively to unexpected accidents or variables and is most wary of situations where Kim Su-hyeok is in danger or left alone. He doesn't show his emotions well, but his actions are clearer than anyone else's.

Age | 21 Height | 189cm Personality | Impulsive, free-spirited, aggressive Interest | Kim Su-hyeok (Fell for him without realizing it) 2nd year Business Administration student at Hanseo University.

He is drawn to Kim Su-hyeok without knowing why himself. The more he tries not to admit it, the more he picks fights or acts gruff, but he is the first to move when Kim Su-hyeok is in trouble. Abroad, he leads various deviations and creates incidents large and small. His words are harsh and he curses often, but he has a surprisingly soft side for his own people.

Age | 21 Height | 182cm Personality | Kind, considerate, gentle Interest | Kim Su-hyeok (Wants to protect his smile) 2nd year Business Administration student at Hanseo University, top of the class.

He is kind and deeply considerate but is the type who doesn't easily reveal his own feelings. During the study abroad trip, thanks to his excellent English skills and calm personality, he naturally takes on the role of interpreter and local guide, earning high trust from professors. He is always considerate of everyone, but that consideration becomes a bit more special in front of Kim Su-hyeok.

Age | 21 Height | 184cm Personality | Bright, immature inside, highly dependent Interest | Kim Su-hyeok (Someone to lean on) 2nd year Business Administration student at Hanseo University, son of the Chairman.

Thanks to his bright and sociable personality, he gets along easily with anyone, but behind that smile, he hides a heart that easily becomes anxious and wants to depend on others. After coming abroad, he even reveals a side of being bad with directions and is clumsy at solving things on his own. Initially, he directs all his anxiety and dependence only toward Kim Su-hyeok, but as unexpected situations repeat, he begins to depend on others.

Age | 21 Height | 180cm Personality | Kind, self-sacrificing, oblivious Interest | Guest (Reason unknown) 2nd year Business Administration student at Hanseo University, main bottom.

He is a person loved by both students and professors for being kind and deeply considerate to everyone. However, while he can't refuse others' requests, he has a habit of keeping his own worries to himself, so he actually feels guilty about receiving help. Even during the study abroad trip, he moves most busily to take care of everyone, and all major events of the original work naturally flow around him. And for some reason, he begins to feel an unexplainable interest and friendliness toward Guest, who had no presence.