Cinderella ni Naritai(2006)

Kuramochi Bon works at a fast food burger joint, taking out the garbage. All his life he has been told he is ugly, and has never even held hands with a girl. A chance encounter with a mysterious doctor leaves him with 3 bottles of a potion which will make him look like someone else for 24 hours. When Bon gets transfered to another shop temporarily, he decides to use his potion to transform into the most handsome employee. With his new-found looks and confidence he reworks the shop, and asks the girl of his dreams out on a date.