This New York Times manga best seller series features handsome, manly men who have cute, girly hobbies

Asuka Masamune is a guy who loves girly things--sewing, knitting, making cute stuffed animals and reading shojo comics. But in a world where boys are expected to act manly, Asuka must hide his beloved hobbies and play the part of a masculine jock instead. Can Asuka ever show his true self to anyone, much less to Ryo Miyakozuka, the girl that he's falling for?

A potion at school causes all the guys to act manly and all the girls to act feminine Suddenly, Asuka loses interest in all the girly hobbies he loves, and Ryo is working at a bakery? Can anything break the spell they're under and turn them back to normal?