I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too, Vol. 3 (manga)

Yuuya Tenjou was proposed to by a princess and invited to a castle in another world, but back in the real world, his new life at Ousei Academy is only just beginning. Watching him dominate in studies, sports, and everything else as if he has cheats turned on, his classmates' eyes start to fill with blazing envy!