十波由真

主人公隔壁班的女生，是主人公班上班长小牧爱佳中学时代的朋友，每天骑着MTB上学和回家。 　　是个好胜心强、不喜欢认输的很阳光的女孩子，但很坚强的外表下却是单纯脆弱的不愿受伤害的内心，因此也养成了嘴硬、喜欢装大人的个性。 　　由于几次不幸的偶然事件而把主人公锁定为仇敌，多次找他一决胜负，还经常找机会陷害他，只是每次都以惨败收场…… 　　最喜欢说的话“不要以为这样就赢了！”，几乎是每次与主人公见面都会说的。 　　比较有理想的孩子，她的真实身份很少有人知道。

简介来自 Bangumi

Yuma is in the same grade as the protagonist from a neighboring class and close friends with Manaka. She is very high-strung and aggressive who rides a bike, and for some reason always collides with Takaaki in many embarrassing situations. This is not helped by the fact that she always holds Takaaki at fault, and her attempts to challenge him to duels always end up worse off than they began. After losing to Takaaki in any way, she often points to him and famously says, "Don't think you've already won this!" [From Wikipedia]

简介来自 VNDB