若槻 雄大

小夜音的青梅竹马。脑袋里也全是肌肉，胃能顶到心脏。虽然运动神经超越人类，脑子也像动物一样。说是笨蛋也好说是不拘小节也好的，爽朗明快的性格。和小夜音的关系就像兄弟姐妹一样好。 父母都是有名的职业运动员，不在身边。 足球少年一样的中长发，晒黑了的结实大个子。 由于父母都是名人，所以作为样本参加了“记忆再生Project”。好像是被寄托了如果有个万一时可以把儿子作为克隆体再生的梦想。

简介来自 Bangumi

Sayone's childhood friend who usually calls her Sayo-chan. He's good at sports in general, has excellent reflexes, and attends the soccer club. He is not very good at studying, though. He is a rough guy and a fool, but he has a refreshing personality. He has famous professional athletes for parents, who are often absent from home because of that. His favorite things are typhoons, meat and mayonnaise. [Edited and translated from the official website]

简介来自 VNDB