Class 1-2. She carries trauma from middle school. She looks cool and distant but is actually extremely shy. She wishes to change her habit of building walls around herself and is so earnest yet clumsy that she even practices smiling. Because she is serious, she often overthinks and gets stuck for words, but she can be her true self with her childhood friend and best friend, Miki. Through her interactions with Yota and Minato, she gradually breaks down her "inner wall" and grows into someone who can face others with her true feelings.

Class 1-6. He used to play the role of a "harmless nice guy" who navigated social situations skillfully to avoid conflict. However, he is forced to confront the emptiness behind that facade and his fear of letting people in. By learning to acknowledge his own ugly parts and face others head-on instead of running away, he gains the strength to "connect with people" in a true sense. He has known Yota since middle school.

Class 1-5. In her effort to be the "cute, ideal girl" everyone expected, she suppressed her true, unrefined self—someone who is blunt, a bit of an airhead, and lacks a sophisticated vocabulary. However, within relationships that accept her for who she is, she decides to throw away her false mask. She learns to prioritize her own satisfaction over the eyes of others and gains the strength to live proudly as herself. She is Koyuki's childhood friend and best friend. As she grows, she finds herself falling for Yota.

Class 1-6. A tall, refreshing member of the basketball club. He is kind to everyone and attentive to their needs. He is a perfect mediator who reads the room to keep things peaceful. He kills his true feelings behind a wall of smiles and avoids deep involvement. However, through his interactions with those around him, he becomes aware of his own ego. He overcomes his cowardice, gains the strength to express his will without fear of getting hurt, and undergoes a dramatic transformation into someone who can face others directly. He has known Minato since middle school. As he grows, he finds himself falling for Miki.