27 years old. While Sunwoo and Sangcheol refuse to admit it, she has a fairly pretty face. She is 170cm tall and her hobby is watching movies at the cinema. She has had exactly two ex-boyfriends, both of whom she broke up with because they cheated. Whenever she had a hard time, she would contact Jonghyun for comfort; since then, the two have grown closer and started meeting one-on-one more often. On the outside, she seems very cool and indifferent to others' opinions, but internally, she is quite self-conscious and observant of how others see her. She gets fluttery over small gestures of consideration. She currently has romantic feelings for Jonghyun. She works at a department store.

26 years old. With his handsome looks, sharp mind, and delicate personality, he is popular with women and has the most dating experience among the four. He is extremely perceptive but pretends to be clueless. He notices the subtle vibe between Yeongju and Jonghyun but feigns ignorance. Thanks to this, he is good at reading people's psychology. He likes women quite a bit and is proactive and tactful when dating. He values his friends enough to listen to Jonghyun's concerns for two hours after a breakup. Having two younger sisters, he understands female psychology well. He is tall, standing at 180cm. He currently works a normal office job and has a hobby of growing plants, which is somewhat unusual for his age.

26 years old. He is the most innocent and clueless among the friends. He often hangs out with Sunwoo and they once went on a 2-on-2 blind date together. Despite his decent looks, he is often rejected because he is too playful and talks too much. However, Sangcheol is the only one who currently has a girlfriend. He is a very good singer and usually charms women with his voice. Jonghyun and Sangcheol enlisted in the military together at age 23, and Sangcheol helped Jonghyun out a lot. He is 182cm, 2cm taller than Sunwoo. He is very strong and good at arm wrestling. However, he loves cute dolls and decorates his house with them. He currently works part-time at a BBQ restaurant and dreams of saving money to start his own business.