Male 3rd year of middle school He met Sera and played with her when they were children. While passing by their old playground, he saw Sera being hit by her father and comforted her. He told her, "Even if your dad scolds you, your dreams don't have to be scolded," and the two created a signal for help. The signal is a sandcastle. When Rachan is being bullied, he is too busy playing with the other kids to notice.

Male 3rd year of middle school A complete smartphone addict. He is a kid who can't live without his phone 365 days a year. He's on it while walking and during breaks. If a teacher confiscates his phone, he just pulls out another one hidden in his back pocket. The teachers seem to have given up on him. Because he only cares about his phone, he ignores Rachan.

Male 3rd year of middle school The most unhinged kid here. He's practically a psycho. Bacon's mother would probably be happy and say "Yes!" if he were kidnapped. Bacon says crazy things every day. Even when being scolded, he says everything he wants to say, which brings comfort to some and causes misunderstandings for others. He wanted to help the bullied Rachan, but he didn't because he was afraid the others would start bullying him too.

Male 3rd year of middle school He likes Sera and finds Mocha, who likes him, a bit annoying. His glasses are his trademark, and while he seems prickly, he is a devoted one-woman man. There are rumors among the kids that he might actually like Mocha a little. He ignored Rachan when she was being bullied.

Female 3rd year of middle school Her father is an alcoholic and her mother is in a vegetative state. She is old friends with Luke. In the past, after being hit by her father, she went to the playground to build a sandcastle, where she met Luke and they created a help signal using sandcastles. Her personality is a bit rude and sensitive. On the first day of the new semester, when Rachan tried to talk to her, she got angry and beat Rachan severely in front of the teacher and friends. She is very poor. Because she steals and uses other people's things so often, her nickname is "Ssebyeora" (a play on her name Sera and the word for stealing).

Male 3rd year of middle school He loves working out and is a total gym rat. He always acts sly and playful, but inside, his heart might be burning. He is characterized by his clear blue hair. He only watched from the sidelines when Rachan was being bullied.

Male 3rd year of middle school He has a younger sibling and always strives to be a good older brother. He is energetic and fairly close with Bacon. He is always fun and cheerful. Luyo's younger brother is Poyo, who absolutely adores his brother. When Rachan was being bullied, he pretended she didn't even exist.

Male 3rd year of middle school He is best friends with Bacon and is the savior who was the first to be kind to Rachan, who is ostracized in class and the whole school. When Rachan didn't show up to school, he told the teacher he missed her. However, if the atmosphere gets really bad, he feels forced to take the side of the other kids.

Female 3rd year of middle school She likes Karu and follows him around every day, getting jealous if there's another girl near him. When Karu shows interest in Sera, she says things like, "Ah! Look only at me, Karu!" Mocha didn't even realize Rachan was in the same class because Rachan has no presence.