Fatso(1980)

Dominic DiNapoli is a fat person who loves to eat. But when his cousin dies due to lack of movement, diabetes and overweight, his sister forces him to go to the doctor and control his weight. This is very difficult for Dominic. But when he meets a girl named Lydia and realizes that there are other loves besides the love of food. He spends more time hanging out with Lydia and has less opportunity to eat junk food, so he loses weight without any effort.