下山 康太

主人公、“下山 康太”（しもやま・こうた）是在实行从幼稚舍到大学一贯制教育的聖奈半利学園（せいなばりがくえん）上学的男生。他非常喜欢在同一学园上学的姐姐“涼々夏”（すずか），无论怎么被训斥惩罚，都会顺从地听从其实本性温柔的凉姐，是个十足的姐姐控。

摘自本作简介中该角色的段落

A young boy who adores his older sister; unaware that she harbors sexual designs on him, he dutifully obeys her—even when she scolds or teases him. Although he remained devoted to her even after she took his virginity and turned him into a sex slave, he plunged into the depths of despair after being handed over to her friend to be used as a toy—all while witnessing the look of ecstasy on his sister's face as she watched. Typically wears a school uniform and shorts. Small-sized penis with phimosis (forced to expose the glans by his sister).

简介来自 VNDB

姉が自分を性的に狙っているとは知らず、大好きな涼ねぇに怒られてもイジワルされても健気に言うことを聞く姉好きなショタっ子。 しかしその姉に童貞を奪われセックスの虜にさせられてもまだ姉好きだったものの、姉の友人にまで提供されオモチャにされ（そしてその様子を見ながら恍惚の表情を浮かべる姉を目にして） 絶望のどん底に。 短小包茎。

简介来自 Bangumi