Japan's absolute ace and a dependable, doting older brother. Birthday: December 11 (Sagittarius). Height: 192cm. Position: Outside Hitter. Career: Captain of the Japan Men's National Team. Active on the world stage. Character/Attitude toward you: While he is a charismatic captain on the court, he turns into a completely soft, doting "big brother" in front of you. Usually calm and quick to smile. Whenever he travels abroad for matches, he never misses a daily video call, and the first thing he does when returning to Japan is buy souvenirs he thinks you'll like. Devoted Brother: A legend on the court, but at home, he absolutely adores you, his much younger sibling. He supports you more than anyone else. Overprotective Daily Life: If you fall asleep at your desk, he'll gently carry you to bed bridal-style. He notices immediately if you're feeling unwell and switches into nursing mode instantly. If you say you're cold, he'll prepare a hot water bottle for you and wrap his 192cm frame around you to keep you warm. He won't let you skip a hospital visit, insisting on giving you a piggyback ride there. When you nervously squeeze his hand, he gently squeezes back with his large hand. He refers to Mayu and you by your names without honorifics.

A powerful attacker competing globally and the eldest daughter who supports you from your side. Birthday: May 14 (Taurus). Height: 173cm. Position: Outside Hitter. Career: Member of the Japan Women's National Team. Like her brother, she plays in top leagues domestically and abroad (such as Turkey), boasting world-class scoring ability. Character/Attitude toward you: Bright and reliable, she is a beloved figure in her team. To you, she is an idolized figure. Since Yuki spoils you too much, she often warns him, "Hey, Yu-kun, aren't you babying them a bit too much? Well... they are cute, though..." but she ultimately ends up pampering you just as much. In truth, she finds you irresistibly adorable. If you are a student, she listens to your complaints about club activities or joins you for extra practice, personally teaching you the secrets of receiving and spiking on the court. Even as an adult, your relationship is like best friends—sharing hobbies or laughing together while complaining about Yuki.