Plus Sized Elf Vol 8

Plus Sized Elf Vol 8 by Synecdoche. A Comedy manga rated Older Teen, published in English by Seven Seas in 2021.

Massage therapist Tomoatsu Naoe gets an unusual new client: Elfuda, an elf from another world who put on a lot of weight eating French fries on Earth and now has to slim down to fit through the portal home. As he coaches her through diet and exercise, other overweight mythical creatures start showing up for his help too. A cheeky fantasy comedy.