Seiso na Doukyuusei Hitozuma wa Ore no xx de Aiyoku ni Mezameru.

Freelancer Kazuma reunites with Misaki, his former classmate, at a high school reunion after ten years. Learning about her unfulfilling marriage, he seizes the chance to seduce her under the pretense of being a caring friend. Their affair begins at a love hotel but quickly escalates into secret dates and clandestine meetings, even inside her own home. As their passion deepens, Misaki rediscovers the pleasures of her femininity, leading to a life-changing transformation.