あらすじ
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.
あらすじはAniListより（英語）。
データベース内の関連マンガ
自社カタログから選出 — 同じ作者、またはジャンルの重なり。