Naoe-kun is a massage therapist at the "Smiley Boar" clinic. One day he gets a new patient named Erufuda-san, who turns out to be an Elf from a different world. All the junk food of this world has taken its toll on her figure. Now she'll try to lose weight with the help of her trusty massage therapist. But Erufuda isn't the only one from her world who's been affected.