Ketsuinu

A mysterious creature with a butt-shaped face rapidly multiplies, leading to a bizarre transformation that turns the owners' faces into butts.

SIMILAR ANIME

Sasami-san@Ganbaranai

A shut-in high schooler uses a computer to spy on her brother, a teacher, and becomes entangled in bizarre events involving magical powers and chocolate.

School

Conflicted

Nisemonogatari

Following the events of Bakemonogatari, Nisemonogatari explores the continuing supernatural entanglements of Koyomi Araragi and his encounters with various apparitions.

School

Conflicted

Fair, then Partly Piggy

After a third-grader's lies in his journal inexplicably come true, he navigates a bizarre reality where outlandish events, like a pig rain, are treated as commonplace.

School

Uplifting