Chichi No Jikan

chichi no jikan follows shinogi kyichi, a male biology student who lives in an apartment near a helpful female neighbor/friend, takarai ayaka. one day, he is visited by aliens, who demand that he raise their baby for a year or else the world is history. the baby is apparently human, and is raised the way humans are: through breast-feeding. kyichi's sex is not a problem for the aliens: they give him a simple device that switches his body to a woman's with the mere touch of a button. conveniently, kyichi's female form is very well-endowed. although she's understandably confused and uncomfortable by the whole situation, ayaka helps kyichi out as he navigates the unfamiliar experience of raising a child, and breast-feeding it in particular. that means going to a store to buy a breast pump, visiting a maternity hospital to get a massage to release kyichi's stored-up milk, and giving the baby a bath together. kyichi, as a biology student, is fascinated by the whole thing from an academic perspective.