水沢博嗣

“难道，你在看不起我？” 家格虽不高但也称得上名门的水泽家长子。非常出乎意料精通钢琴演奏，但是非常不愿意被人听到。个性在四人之中比较正直，却不知何故认为和树看不起自己，总是一副在赌气的样子。在四人中地位最低，经常被迫替他们跑腿。手非常灵巧，汽车故障时也是由他负责修理。和其他三人从幼儿园开始内部升学不同，高中时才进入慧樱和他们相识。

简介来自 Bangumi

He comes from the main branch of a small, but renowned and wealthy family. Although he may not look like it, he is the eldest son. Though all four of them study at the same prestigious university, the other three have been advancing together since kindergarten through the so-called internal escalator school system, and only Hirotsugu entered the university from the "outside", by applying from the high school division. Perhaps for this reason, he gets grumpy every time the topic shifts to anything that happened before middle school. He's a semi-professional pianist, but rarely plays in front of others, and gets angry if you praise him. He is dexterous and good at repairing machinery. [Translated from Official site and Wikipedia]

简介来自 VNDB

名前を言えば誰でも知っている有名企業の御曹司。 見かけによらず長男。 皆と同じ名門私立大に通っているが、他3人が幼稚舎からのエスカレーターなのに対し、博嗣だけは高等部からの外部入学。 そのためか、中学校以前の話題になると不機嫌になる。 ピアノの腕はセミプロ級だが人前では滅多に弾かない＆褒めると怒る。

简介来自 Getchu