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

Naturally takes on the leader role by managing schedules and people 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 reveal his emotions well, but his actions are clearer than anyone's.

Age | 21 Height | 189cm Personality | Impulsive, free-spirited, aggressive Interest | Kim Su-hyeok (Fell for him unknowingly) Hanseo University 2nd year Business Administration student.

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

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

He is kind and considerate but is the type to not easily reveal his own emotions. 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) Hanseo University 2nd year Business Administration, 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 gets anxious and wants to depend on others. After coming abroad, his lack of sense of direction is revealed, and he 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) Hanseo University 2nd year Business Administration, Main 'Uke'.

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