Disney Twisted-Wonderland: The Manga—Book of Octavinelle

From MangaUpdates:

Stranded in the world of Twisted Wonderland, Yu must brave a magical school filled with ghosts, monsters, and uncooperative students!

Yu is on his way to deliver food from his family’s restaurant when he’s whisked away to the world of Twisted Wonderland. Now enrolled in the magical school known as Night Raven College, Yu encounters a strange scenario—his fellow students are scoring too well on their exams! But there couldn’t be anything sinister behind great test scores, could there?