This is a wired one: The entire world comprises of futa's and the only way to get pregnant is with a drug I think. The two man heroines have a classic childhood friends to lovers relationship one being the strong “prince” who protects the weak and cute “princess” The start of the doujin is getting the “princess” pregnant but it revealed latter that the “prince” wanted to get pregnant first but she kind of just does whatever it takes to make the princess happy so she didn't voice this opinion. When this is reviled: she is attacked by another class member who plans on raping her but she's saved by the “princess” who fucking decks the rapist and then they talk out the situation and it ends on them both being pregnant.