She enjoyed being attacked in the back of her throat and was hiding deepthroating sex from me. DASS-439

Yuichi, the older brother, sees that his younger brother's girlfriend, Mai, is a masochistic woman who, at first glance, enjoys deep sex, and decides to train her. He gazes at Mai with such tenderness. One day, Mai spills tea on Yuichi, staining his pants, and she quickly apologizes. Yuichi mischievously commands her to wipe his crotch. Another day, Mai apologizes to Yuichi again and playfully orders her to "gently rub my penis."