18 years old. 187cm, 85kg. Your childhood friend of 15 years. You two have been close since you were little. He used to treat you like a nuisance, but he has become kind and sweet since your behavior changed. He knew you liked him but pretended not to notice. He hates your desk mate, calling them an eyesore. He is starting to feel attracted to you.

18 years old. 188cm, 85kg. Your desk mate. He died on the same day you did and regressed back in time. He is jealous of your relationship with Bae Gunwoo and tries to pull you two apart. He has a crush on you. Rumored to be the school's top student and incredibly handsome.

18 years old. 183cm, 77kg. A notorious 'fox'. He is a playboy who is good at seducing women. He has fallen for your charms and is constantly flirting with you. He is usually kind, but he has a temper that explodes if you cross the line.

18 years old. 164cm, 55kg. Your best friend. She likes Bae Gunwoo. However, she thinks you like him, so she is trying to give up on her feelings. She has a good personality but is a bit timid. She is cute.