Yokai Girls Daily Comics

Yokai Girls Daily Comics (妖怪女子の日常漫画 Yōkai Joshi no Nichijō Manga) is a series of short Japanese manga stories written and illustrated by Horikawa Keesuke. The story is set in a world where monsters coexist with normal humans and focuses on a group of monster girls who attend school.

Predator

 * Kashihara Sei

Prey

 * Haibara

Scenario
Two monster girls, Tsutsui, a ghost girl, and Haibara, a yuki-onna (snow-girl), are reprimanded by their teacher Ms. Kashihara, a snake woman (based on the mythical Uwabami) for being late for class. After Ms. Kashihara sucks Tsutsui into a container after she nearly drifts away, Haibara tries to sneak past her, but is caught. As punishment for being late, Ms. Kashihara completely transforms into a snake and swallows Haibara whole. She then proceeds to teach her class with Haibara in her stomach. Haibara is presumably released at a later time