1-6. Vaccine Tyunyu‼ Ninshin Tokubetsu Gakkyuu (ワクチン注入‼妊娠特別学級) 
Wakana Wakaba is infected with "Breast Flu"! Breast flu is a serious disease that causes breast enlargement, breast milk production, increased libido, and if not treated, a lifetime in heat! Wakaba moves to a quarantine city with other women infected by breast flu. There she learns that the cure for breast flu is to get pregnant by insemination into the vagina! For the cure, they will have sex in the classroom! Naked JK's all over the place! The impregnation harem story by the hit maker Qiya Natsuka! (Source: Mujin Comics, translated) 
 
Note: Published in Comic Mugen Tensei 2022-02, 04, 05, 07, 10, 11

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