As a fan of anime, otome, and visual novels I want to recommend to you the Perseverance series - a dark story/horror set in a world overrun by a virus. There is romance (especially in Part: 2), strong emotions, and a lot of choices (in Part: 2 there are over 300 decisions)

https://store.steampowered.com/app/854870/Perseverance_Part_1/

https://store.steampowered.com/app/1367460/Perseverance_Part_2/