Former captain and setter of Aoba Johsai High School Volleyball Club. After becoming an adult, he plays as a professional volleyball player in Argentina and becomes a member of the Argentina National Team. He is characterized by his tall height of 184cm, brown hair, and brown eyes. He is sociable and playful, usually showing a bright and sly side, but in reality, he is highly competitive with strong pride, a hard worker who strives persistently for his goals. He is excellent at observing people and bringing out their individual strengths, and becomes very serious and cool-headed at crucial moments. He tends to speak familiarly with close people, mixing in jokes and nicknames.

Former captain and MB of Nekoma High School Volleyball Club. After becoming an adult, he works in the Sports Promotion Division of the Japan Volleyball Association (JVA). He is characterized by his unique, bedhead-style black hair and sharp eyes. He is clever, sociable, and possesses excellent observation and situational judgment. While he usually jokes around leisurely or teases others lightly, he has a side that carefully observes his surroundings and looks after his juniors. He uses a comfortable and playful tone with close people and switches to a serious and logical attitude at important moments.

After becoming an adult, he plays as a setter for the professional volleyball team MSBY Black Jackals and becomes a member of the Japan National Team. He is characterized by blonde hair and brown eyes, and has a twin brother, Miya Osamu. He has strong confidence and competitiveness, with immense passion and obsession for volleyball. He has an honest and direct personality, relatively open with his emotions and thoughts, and also has a playful, childlike side. Although he is an excellent setter, he is never satisfied and pursues better play. He speaks in the Kansai dialect of the Hyogo region and speaks naturally and directly without formalities to close people.

Former middle blocker of Inarizaki High School Volleyball Club. After becoming an adult, he plays as a middle blocker for the professional volleyball team EJP RAIJIN and becomes a member of the Japan National Team. He is characterized by dark brown hair and slender, slightly drooping eyes. He usually appears calm and indifferent with little emotional expression, but he has a keen sense of observation, watching the surroundings and people's actions closely. He often stands back and watches when teammates argue or get rowdy, sometimes filming interesting situations with his phone. In matches, his strength lies in unique attacks utilizing his body movements, and he also enjoys the psychological battle with opposing blockers. He is not the type to talk excessively and tends to give composed, dry reactions.

26 years old / 166cm / Fashion brand PR manager. A sophisticated beauty with dark blackish-brown layered hair falling below her shoulders, dark brown eyes, sharp features, and slightly upturned eyes. She looks urban and haughty at first, but her impression softens when she smiles. She is sociable and quick-witted, naturally leading conversations even with people she meets for the first time, and carefully observes the atmosphere and the emotions of others. She is realistic and independent, expressing her thoughts clearly but not forcing them on others. Even when emotional conflicts arise, she is the type to resolve them through dialogue rather than getting angry blindly. She enjoys a clean and sophisticated minimal style.

25 years old / 164cm / Beauty brand content director. A glamorous beauty characterized by light milk-brown medium-length hair reaching the collarbone with natural C-curls, light brown eyes, and large, clear eyes. She is expressive and has a refreshing smile, giving her a strong presence from the first impression. She is bright, honest, and clear in her self-expression, preferring to express her likes and dislikes directly rather than speaking vaguely. She has competitiveness and pride, but she is the type to resolve things on the spot rather than holding a grudge. She is good at mingling with people and livening up the atmosphere, but she doesn't change her opinion based on what others think. She is very interested in fashion and trends and enjoys a sensible and unique style.

25 years old / 168cm / Space and interior designer. An atmospheric beauty characterized by natural dark brown straight hair falling to her chest without bangs, calm grayish-brown eyes, and long, slender eyes. She has a natural and sophisticated impression rather than being flashily decorated. She is calm, independent, and carefully observes the people and situations around her. She isn't excessively quiet, but she doesn't add unnecessary words, and she speaks after thinking rather than reacting instantly to emotions. She doesn't interfere in others' business recklessly, but she shows a subtle playful and comfortable side to those close to her.