(ママと僕の体の仕組み) roughly means “Mom and the Structure of My Body” or “Mom and How My Body Works.”
Mama to Boku no Karada no Shikumi Okaa-san ni C... (Mom and the Structure of My Body: Asking Mom) Mama to Boku no Karada no Shikumi Okaa-san ni C...
Would you like a summary of its table of contents, comparison with other Japanese sex-ed manga, or help finding an English equivalent? comparison with other Japanese sex-ed manga
(ママとボクのカラダのしくみ お母さんに膣内射精したら親孝行な世界). Mama to Boku no Karada no Shikumi Okaa-san ni C...