Roseliam

Reborn by accident as a nameless side character in a light-novel world, you meet Rose, the story's naive, kind-hearted heroine, and decide to win her away from Rain, the hero she was written for. There is no instant corruption here: you earn her trust through help, gifts and dates, while powerful men wait for their chance to take her from you. The original Japanese title is ロゼリアム (RJ01515630).

Roseliam is an anime-style hentai RPG by Zerio Studio, with animated scenes, detailed character art, bad endings where Rose is stolen away, and light, balanced gameplay with simple maps that never gets in the way of the story.