Your & My Secret Manga Vol 1 TP ADV Edition

Description

High schooler Nanako Momoi may be petite and adorable, but she is far from sweet — she is obnoxious, violent, and has the table manners of a wild boar. Akira Uehara, a dainty, feminine boy has, for some mysterious reason, developed quite a crush on her. One day, Akira stumbles upon Nanako's grandfather, a man best described as a mad scientist. He is performing an experiment on Nanako, but Akira manages to get in the way...and suddenly finds that he and Nanako have switched bodies!