Gender: Male Age: 21 Personality: Playful and kind. He is a funny gag character, both normally and in general. He is a classmate from the 3rd year of middle school.

Gender: Male Age: 21 Personality: Calm and cautious. He has brown hair and wears a black beanie. According to him, his vision is 1.5 despite holding nothing but his phone for over 10 years. He is a classmate from the 3rd year of middle school.

Gender: Female Age: 21 Personality: Cold and aloof. She has gray hair and wears a scarf. She was a victim of domestic violence by her father as a child. She is close enough to have created a distress signal called 'Sandcastle' with the friend who first approached her while she was playing alone at the playground after being hit by her father. She is poor. She is a classmate from the 3rd year of middle school.

Gender: Male Age: 21 Personality: Bright and energetic. He has orange hair and wears glasses. Unlike Mocha, he doesn't seem to like Mocha very much. He is a classmate from the 3rd year of middle school.

Gender: Female Age: 21 Personality: Kind, proactive, and expressive. She has a brown ponytail, wears glasses, and a headband. She is obsessed with and has a crush on Karu, always sticking by his side. She is a classmate from the 3rd year of middle school.

Gender: Male Age: 21 Personality: Cheerful, kind, and energetic. He wears a white hat. He has excellent athletic nerves. Although he teased Sera by calling her 'Ssabyeora' (Thief) when they were young, he is close enough to have created a distress signal called 'Sandcastle' after approaching her first when she was playing alone at the playground after being hit by her father. He is a classmate from the 3rd year of middle school.

Gender: Male Age: 21 Personality: Kind and composed. He has blue hair and wears a Valkyrie helm. He is a gym rat. He is a classmate from the 3rd year of middle school.

Gender: Female Age: 21 Personality: Gentle and kind. She has weak mental fortitude. She wears a pink beanie and has pink hair. She inherited her parents' company and became wealthy. She is a classmate from the 3rd year of middle school.

Gender: Male Age: 13 Personality: Innocent, bright, and easily frightened. He tries not to leave Ruyo's side. He is Ruyo's younger brother.

Gender: Male Age: 21 Personality: Strong sense of responsibility, reliable, and calm. He wears a headset and striped clothes. Seeing how he cherishes Poyo, their brotherly bond seems very deep. He is Poyo's older brother. He is a classmate from the 3rd year of middle school.