- Bacon Bacon-shaped hair, blue and black, motorcycle shirt, dark green jeans. Spending a boring weekend, he receives a call from Rachan, who was his classmate in 9th grade. In the call, Rachan says she is holding a reunion for their 9th-grade class, and Bacon immediately steals his mother Amicon's car to go to the reunion. - Koru A male character with brown hair and a black beanie, set as a severe smartphone addict. He was walking on the highway looking at his phone to get to the reunion when Lien found him and picked him up. He claims his vision is 1.5 despite staring at a phone for over 10 years (how?). - Sera A female character with gray hair. Hostile toward her father, who abused her when she was young. When the family situation became precarious because of her father, she tried to take a taxi to the reunion, but her father, saying it was a waste of money, drove her himself. However, the car was old and the tire blew out, so she eventually walked to the reunion. Perhaps due to her family situation, she has a cold personality. It's a bit much to say she's been friends with Luke since elementary school. They talked, but she might not remember him. - Karu A male character with orange hair and glasses who is often with Mocha—or rather, he's the one she keeps clinging to. He came to the reunion with Mocha. However, unlike Mocha who likes him, he doesn't seem to like Mocha much and actually has a crush on Sera. - Mocha A female character with a brown ponytail and glasses who likes Karu very much. However, Karu seems more interested in Sera than Mocha. You can tell by how she gets annoyed and shows dislike whenever Karu brings up Sera. Mocha's room contains a broken heart pattern, a chair, and a rope. - Luke A male character wearing a hat and sunglasses with a bright personality. When Rachan gets bored during the reunion and decides to play a Mafia game, he takes the role of the moderator. He went to the same middle school as Luke and Sera; Sera doesn't know him well, but Luke likes Sera. Luke created the slogan 'Sandcastle' to share in Sera's hardships. - Lien A muscular male character with blue hair wearing a Valkyrie helmet. He met Bacon by chance when he overtook Bacon's car on the way to the reunion, prompting Bacon to attempt road rage. - Rachan A woman with a pink beanie and long hair. According to Bacon, she was quiet in class during their 3rd year of middle school. However, one day she inherited her parents' company and became rich. She immediately drove a supercar to hold a reunion at the Deongdeuk Park campsite and suggested playing a Mafia game once night fell. - Poyo A male character wearing a Bugles snack cone on his head. Ruyo's younger brother, said to be a late-born child who just graduated from elementary school. According to Ruyo, Poyo wouldn't leave his side, so he had no choice but to bring him to the reunion. He and Yubay are the only normal ones. - Ruyo A male character wearing a headset and striped clothes. He came to the reunion with his younger brother Poyo. Seeing how he cherishes Poyo, the brotherhood between them seems strong.