Yumari Kawaya, a serious honor student at school, is secretly obsessed with the pleasure of defecating in the "bathroom"... When Yukinami Takaga, a big-breasted kuro-gal who doesn't get along with Yumari, witnesses her beatific face after defecating, the door opens to a new fetish! (Source: Shonengahosha, translated) *Note: Originally serialized under the name Otoilet Ikusa Shoujo: Yumari-chan (おトイレ戦少女 ゆまりちゃん), the title was changed for the volume release.*

Nekokabu Suzu, who was assigned to the Counseling Department as soon as she was newly appointed, has trouble dealing with 13 students who are divided into different constellations and have too many personalities!?