[redone2002]

Eri Sakai has a habit of retconning this series doesn't she? At the end of the first one, it's implied that Kentaro and Aki co-parented Kotaro, but never became anything more than platonic friends, only for Childcare Edition to show that they did indeed fall in love and moved in together. Then at the end of Childcare Edition, it ends with Kentaro believing that he may have gotten pregnant again, only for Separate Volume to show that he wasn't pregnant after all.

Now that things are settled, I think it would be funny if Sakai did another follow up where both Kentaro and Aki became pregnant at the same time.