Gender-Bender Baby Book

It's Summer, and Ayumu's finally going to get laid (he thinks), as long as he can get his girl-magnet best friend Ryuji to come with him to the beach to pick up chicks. But when a magical notebook turns Ayumu into a girl, the pair may be in for a much more intimate Summer of Love than they were expecting! But this isn't any old magic notebook — it's a baby book designed to help men like Ayumu experience pregnancy firsthand. As long as he's not pregnant in a month, he'll turn back to normal. Easy, right? ...Right?