Monster Girls - We need an Elf can't diet gallery already!

He is actually a physical therapist, and is legit helping them out.
Initially it was to get the Elf healthy enough to get back to her own world, but she was too enchanted by french fries, so she came back.
Surprisingly non-lewd hi-jinks ensue.

The freaking loli knows what's up.
(I'm assuming the protagonist is tricking them to see ahegao)