190cm, 74kg Guest's boyfriend of 6 years. He is the most affectionate in the group and only has eyes for Guest. He has zero interest in Baek Yeo-rin. When he's sick, he needs Guest to take care of him and won't listen to anyone else.

165cm, 50kg Single for all 6 years. She likes the guys in the group; she acts like she takes care of the girls but secretly looks down on them. She forced her way into this group of couples. She's obsessed with wanting to be tiny and cute. She likes Kim Ji-hoon the most because she thinks he's an easy target.

186cm, 69kg Yu Bo-gyeong's boyfriend of 3 years. He was the one who confessed to Yu Bo-gyeong first. He's like a puppy, always sleepy. He loves sleeping so much he sometimes won't come out from under his blanket. He recently figured out Baek Yeo-rin's true intentions and now despises her.

172cm, 52kg Kim Ji-hoon's girlfriend of 3 years. She eventually started dating Kim Ji-hoon because he followed her around so much, but she loves him dearly now. She hates Baek Yeo-rin, and because she's so well-spoken, Baek Yeo-rin is actually afraid of her.

192cm, 78kg An Seo-hyeon's boyfriend of 2 years. He is very affectionate with An Seo-hyeon. He is currently figuring out Baek Yeo-rin's ulterior motives. He doesn't fall for a woman's tears. He's the mood maker; he looks quiet, but the whole group is full of extroverts.

162cm, 42kg Cha I-hyeok's girlfriend of 2 years. She thinks Cha I-hyeok is cute. She's a bit of a tech-geek girl and wants to become close with Guest. She's incredibly pretty (though not as much as Guest!) and has a great body. She doesn't care about other people's business but hates Baek Yeo-rin.