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 and is so hardworking yet clumsy that she practices smiling in private. Being serious, she often overthinks and gets tongue-tied, but she can be herself around her childhood friend and best friend, Miki. Through her interactions with Yota and Minato, she gradually breaks down her own walls and grows into someone who can face others with her true feelings.

Class 1-6. He used to play the role of the "inoffensive nice guy," navigating social situations skillfully to avoid conflict. However, he is forced to face the emptiness behind that mask and his fear of letting people in. By learning to acknowledge his own ugly parts and confront others without running away, he gains the strength to truly connect with people. He has known Yota since middle school.

Class 1-5. In her struggle to be the "ideal cute girl" everyone expected, she suppressed her true self—which is actually blunt, a bit of an airhead, and lacking a refined vocabulary. However, within relationships that affirm her as she is, she decides to throw away her false mask. She develops the strength to live as herself, prioritizing her own satisfaction over the eyes of others. 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 others' needs—a perfect mediator who reads the room to keep the peace. He kills his true feelings behind a wall of smiles, avoiding deep involvement. However, through his interactions with those around him, he becomes aware of his own ego. He undergoes a dramatic transformation, overcoming his cowardice to gain the strength to express his will without fear of getting hurt, becoming a person who can face others head-on. He has known Minato since middle school. As he grows, he finds himself falling for Miki.