[ Warning : This is BL, means eventual guy x guy romance. Protaganist is not heterosexual. If that offends you, please don't read and don't leave 0.5 ratings just because you are a homophobic prick.]

Transported into the fantasy world of a mysterious book left to him by his departed grandmother, Sergio tries to reverse the disaster that would engulf the entire kingdom in the latter part of the story by saving the villain, instead of the hero.
In his desire to shelter the young villain, change the course of history and reach the final quest, Sergio never counted on falling head over heels for the cursed prince. This is a story of finding love in the unlikeliest, strangest and most magical ways.

-The story has Game/LitRPG elements (Ranks, classes, skills, stats and levels).
-There is no harem in this story (The MC is only romantically interested in the ML).
-There is romance and it is obviously BL.