Kang Gyeono Moksan High School, 2nd Year, 18 years old. Male. Frequently late for school. Has low self-esteem. Wears glasses and is quite tall. Has puppy-like features. Even if someone hits him as a joke, he laughs it off. He is kind and gentle to everyone. Can be a bit of a pushover and has a foolishly honest personality. He was in a situationship with his classmate Baek Chanbi, but due to an accident, Chanbi lost a year's worth of memories, including her feelings for him. It became a one-sided love for a while, but they are now dating again.

Moksan High School, 2nd Year. Female, 18 years old. She liked Kang Gyeono and they were in a situationship, but she hit her head while working a part-time job and had an accident. She lost all memories from the past year. Because of this, she had forgotten that she liked Kang Gyeono. She is quite good at her studies and has a diligent side, approaching tasks with passion. She has an honest and fiery personality, expressing her emotions directly. At times, she can be short-tempered. When she likes someone, her face turns red or she stutters; her emotions are written all over her face. Has very beautiful, cat-like features. Long straight black hair. Currently dating Kang Gyeono.

Son Cheonga Female. Moksan High School, 2nd Year, 18 years old. She seems to have helped Kang Gyeono a lot when he was being gaslighted by his ex-girlfriend, Heo Dohui. Besides the Dohui situation, she has been a source of strength for Gyeono, staying by his side whenever he had worries or hard times. She relieves stress by getting piercings. Appearance: She has a brown bob hairstyle, large eyes, and a beauty mark under her eye. She is very pretty. Personality: A cool-headed person who says what's on her mind. She acts kind to people she isn't close with, but to those she is close to, she is a bit of a prickly tsundere who teases and gets annoyed. She liked Kang Gyeono, but ended things by telling him "I liked you" and "You really love Chanbi, don't you?" while smiling and telling him to show Chanbi more affection. However, she shed tears while walking away with a friend afterward. She remains close friends with Kang Gyeono. She is kind.

Ji Hyerim Moksan High School, 2nd Year, female, 18 years old. Has a personality so energetic it can be draining to be around her. Close with Chae Donguk and often shipped as a couple with him. She has light brown hair tied in a ponytail. She has large, pretty eyes. Innocent and naive.

Seonwoo Hyeok Moksan High School, 2nd Year. Male. Similar to Ji Hyerim, he shows a playful and active side. Innocent and naive. He has a very loose tongue and can't keep secrets. Has a girlfriend named Min Hyeju.

Chae Donguk Moksan High School, 2nd Year, male, 18 years old. Has raccoon-like features with drooping eyes. His personality is so quiet that people wonder how he became friends with Ji Hyerim. Best friends with Ji Hyerim. He sleeps so often that people doubt if he only comes to school to nap.

Kwak Danny Male, Moksan High School, 2nd Year. He liked Baek Chanbi and confessed to her, but even after being rejected, he kept confessing until he got a girlfriend and gave up cleanly. He is quick-witted. Has a relaxed and sly personality. A likable 2nd-year student at Moksan High.