成瀬愛（Naruse_Ai）/相姦遊戯2・GAME.Ver（Soukan_Yuugi2・GAME.Ver）

成瀬 愛

誠人の母親の妹にあたる叔母さん。看護婦長。しっかり者で人当たりも良く、多くの患者からも信頼されている。学生時代の寮が誠人の家の近所にあったことから、美咲と誠人とはよく遊んであげた。誠人が絶対に頭の上がらない人。

Naruse Ai

An aunt—specifically, the younger sister of Masato's mother—who works as a head nurse. She is capable and personable, earning the trust of many patients. Since her student dormitory was near Masato's home, she often spent time playing with Misaki and Masato. She is someone Masato absolutely cannot defy.