Provided with gender-switching device

Alien abduction stories are a staple of pulp science fiction, complete with variations in which humans raise alien babies. Gender-switching stories are also perennially popular, especially in Japan. The manga Chichi no Jikan by Kuronosuke Shirata, published in book form by Tokuma Shoten on April 20, combines the two themes in a very bizarre way.

Chichi no Jikan ("Breast Milk Time," or alternatively, "Father Time") follows Kyūichi Shinogi, a male biology student who lives in an apartment near a helpful female neighbor/friend, Ayaka Takarai. 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 breastfeeding. Kyūichi'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, Kyūichi's female form is very well-endowed.

Although she's understandably confused and uncomfortable by the whole situation, Ayaka helps Kyūichi out as he navigates the unfamiliar experience of raising a child, and breastfeeding it in particular. That means going to a store to buy a breast pump, visiting a maternity home to get a massage to release Kyūichi's stored-up milk, and giving the baby a bath together. Kyūichi, as a biology student, is fascinated by the whole thing from an academic perspective.

Several chapters of Chichi no Jikan can be read at Web Comic Zenyon (Japanese only).

Sources: Web Comic Zenyon and Comic Natalie