Sakurako's Cuckolding Tale

Modern Japan. Sakurako, heir to the Tsuchimikado school of onmyodo, has spent her days fighting evil yokai beside her childhood friend and aide Takimaru. When a sealed yokai breaks free in a remote village, the two rush there, and Sakurako falls into a trap laid by the yokai and a creepy otaku who holds Takimaru hostage. The price of his safety: she becomes the otaku's girlfriend. She plays along while working to free Takimaru, unaware of the love curse that makes her fall for him a little more each day. Thirty days remain.

Sakurako's Cuckolding Tale is an anime-style NTR hentai RPG by kanikoucha, built on a countdown where every day pushes the curse further.