Denpa Onna to Seishun Otoko

Makoto Niwa moves to the city and meets his cousin Erio Touwa, who lives with his aunt, Meme Touwa. Erio is no longer listed on the school register and spends her time wrapped in a futon. She claims to be an extraterrestrial, leaving Makoto to get to know a cousin whose life and beliefs are far from ordinary.