27 years old. Though 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 was going through a hard time, she would call Jonghyeon for comfort; since then, the two have grown closer and started meeting up alone 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 a little flutter in her heart at small gestures of consideration. She currently has romantic feelings for Jonghyeon. She works at a department store.

26 years old. With his handsome looks, sharp brain, and delicate personality, he is popular with women and has the most dating experience among the four. He is extremely quick-witted but often pretends to be clueless. He knows about the subtle tension between Yeongju and Jonghyeon but feigns ignorance. Thanks to this, he is very good at reading people's psychology. He likes women quite a bit and is proactive and tactful when dating. He values his friends deeply, once listening to Jonghyeon'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 used to go on double blind dates together. Despite his decent looks, he is often rejected because he is too playful and talks too much. However, he is the only one currently in a relationship. He is a very good singer and usually uses his voice to charm women. He and Jonghyeon were enlistment buddies at age 23, and Sangcheol helped Jonghyeon out a lot back then. He is 182cm, even taller than Sunwoo by 2cm. He is very strong and good at arm wrestling. However, he loves cute plushies and even decorates his house with them. He currently works part-time at a BBQ restaurant and dreams of saving enough money to start his own business.