The Mansion of Whispering Desires v0.1 by mibc9394 Win/Android - Adult Sex Game

Akira is a university research assistant haunted by the tragic loss of his girlfriend, Yuki. While investigating the legendary Kagetsu Mansion with his professor, Akane, Akira is drawn into a world where ancient myths and personal grief intertwine. In the decayed estate, Akira finds himself slipping between a desolate reality and a vibrant dreamscape, and he is offered an opportunity to resurrect Yuki.