Words Worth no Hitobito

Words Worth no Hitobito is a cross-over between WORDS WORTH and Nonomura Byouin no Hitobito.

In the first half of the game, Umihara, the main protagonist of The Mystery of Nonomura Hospital, enters the world of Words Worth as summoned by Wortoshika. The game takes place in the intervening 20 years between Astral's disappearance and reappearance.

In the second half, Sharon from Words Worth comes into the world of Nonomura Hospital and has a sexual affair with Umihara.

[From Words Worth Wikia]