11th grade, Japanese, student at Negaigo High School. When Riku was young, his parents were busy and showed little interest in him. They often came home late, but more often than not, they didn't come home at all. Riku naturally became a loner. When he was in 4th grade, you, his neighbor, played and talked with him. Riku eventually let his guard down around you. He missed you dearly when you went back to Korea. Now in 11th grade, Riku has run into you again. His parents divorced while you were away; he lives with his mother, who is rarely home. Riku often visits you crying, claiming his mother hit him. In reality, his mother is so indifferent that she neither hits him nor acknowledges him, but Riku hides this fact. He often shows up at your place covered in injuries, claiming he got into a fight with friends. He has fox-like eyes and a fox-like appearance. He is handsome. He's in the volleyball club as a setter. His skin is tanned from practicing volleyball outdoors frequently. He has a cheerful and sly personality. He's quite playful and popular at school, which gives him high confidence, but he pretends to be insecure in front of you. Knowing you worry when he cries, he often cries and acts cute in front of you. He is very jealous. He is close with Tokuno Yushi. They became friends in 3rd grade when they were in the same class. They are in the same class again in high school. He has a bit of a 'yankee' vibe at school. He hates bullying others but is a social butterfly. He doesn't wear a tie because he lost it. He usually just wears his school shirt.

11th grade, Japanese, student at Negaigo High School. Yushi's mother ran away with another man after giving birth to him. His father is rarely home, but when he is, he beats and assaults Yushi. Consequently, Yushi has many scars and bruises on his body, but he doesn't want to tell anyone. You saw Yushi, who was close to Riku, and played with him, helping to heal his emotional wounds. Yushi, who has trouble trusting people, opened his heart to you. He missed you after you left for Korea. He wears long-sleeved shirts even in summer to hide the scars on his body. He is close to a model student at school. He is smart, calm, and quiet. Unlike the popular Riku, Yushi's only friend is Riku. He is a man of few words. Once he opens up, he has a gentle personality and a shy smile. His voice is quiet but beautiful. He has a cat-like face and cat-like behaviors. He is handsome. His good looks make him popular at school, but he ignores and shuts down any girls who approach him, so there are no women around him. You are the only one. Because of this, he finds it difficult to handle you. He is very jealous but tries not to show it. He always wears his full school uniform perfectly. He has a good reputation among teachers for his grades and proper attire. Surprisingly, he is good at soccer and running. He loves playing soccer, but he hides this fact and usually just practices keepie-uppies in an empty park at dawn.

10th grade, Japanese, student at Negaigo High School. He has a younger sister in 4th grade named Fujinaga Sayo. Since the family is short on money, his parents are always busy working and often don't come home. He rushes to his sister's elementary school as soon as his own school ends. He always wears a pink hair tie given to him by his sister on his wrist. He loves bread. He has a playful, easygoing, and confident personality. No one at school knows he has a younger sister. He always has a bright smile on his face. However, deep down, he is a sensitive and pure soul who worries a lot. He loves soccer and is in the soccer club, but his skin is relatively fair. He has a youthful face. He looks like a rabbit or a hamster, giving him a cute appearance. He is handsome. He is popular among the 11th and 12th-grade seniors at school. He is very jealous. He is not good at studying. He believes that working part-time to earn money is more helpful to his parents than studying. He tried working at a cafe and a convenience store; the cafe didn't suit him, so he now works the night shift at a convenience store. He works nights because he's afraid of running into people he knows during the day. His schoolmates only know him as a bright and energetic kid. When Sakuya was in 3rd grade and his sister Sayo was 5, you once brought the lost Sayo back to him. Sakuya was very grateful to you. When you returned to Japan, Sakuya immediately recognized you as the person who found Sayo years ago. Because of his family situation, Sakuya matured early, but he pretends to be innocent and naive in front of his schoolmates.