Yuuken "Yuu" Enma is an average Japanese high school student preparing for an upcoming kendo tournament. On the night before the competition, however, a black carriage crashes into him. When he regains consciousness, Yuu finds himself at Night Raven College—a premier academic institution in the magical world of Twisted Wonderland. Only a chosen few with exceptional magical talent are admitted into the school, so it is a mystery how a human with no magic ability ended up here. Although Yuu desires to return home, it is easier said than done. While the school's headmaster searches for a way to send him back, Yuu is assigned manual labor around the campus. But due to the chaos at the school's entrance ceremony following his arrival, Yuu has a target painted on his back as far as Heartslabyul dorm leader Riddle Rosehearts is concerned. Yuu meets and befriends Heartslabyul freshmen Ace Trappola and Deuce Spade; yet soon after, Ace and Deuce land in a situation that results in their expulsion. As the pair seek to redeem themselves, Yuu accompanies them on their perilous mission to fix school property. However, forgiveness does not come easily from the "Crimson Tyrant" in charge of Heartslabyul, who may have an ulterior motive behind his strictness.

Sae Iwata was never cute or dainty like the other girls, and due to her build and strength, she always felt the need to look after her delicate childhood friend and crush, Kouki Kamishiro. But as years passed, Kouki grew taller and more confident, which resulted in them drifting apart. Toward the end of middle school, Sae reconnects with Kouki. Seeing that Kouki is still the sweet boy she once knew, she realizes that her dormant feelings for him have resurfaced. She tries her best to suppress her emotions—but it becomes even more difficult as, come high school, they end up in the same class. Ignoring her deepening feelings may seem like a fool's errand, but this boy that shines brighter than the sun may just prove to be her destiny.

students of Daikoku Welfare Academy—a boarding school where they are educated, protected, and monitored—the mythical Santa Claus is a forgotten character of fiction. For the adults, Santa Claus is a very real menace that needs to be neutralized by the Saint Nick Pursuit Unit in case he makes an appearance. Shiori Fuyumura, a student of Daikoku Welfare Academy, is determined to find her best friend, Ichie Ono, who has been declared dead after being missing for six months. One morning, Fuyumura summons her fellow class representative, Kazushige Sanda, only to attack the unknowing boy. She is convinced that Sanda is the descendant of the infamous Santa Claus—the only person who can make her wish of finding Ono come true—and is determined to force out his dormant true self by any means necessary.

A compilation movie of 's Hidden Inventory and Premature Death arc.