やけっぱちのマリア (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Yahachi Yakeino, a.k.a. Yakepachi, a hard-core junior high school student, has "given birth" to a cute girl, and the whole school is in an uproar! Maria and Yakeppachi are now in a great battle against the "Tateyoko no Kai", a group of gangsters! Here comes a unique sex education manga!

(Translator: DeepL)