Electric Wave Woman and Youthful Man

The story revolves around a highschool boy named Niwa Makoto. He lives with his aunt’s family since his parents are away on business. It is there where he meets his mysterious cousin of the same age Touwa Erio — who happens to tie a futon mattress around her upper body and is a self-proclaimed alien. Her staple food is pizza. Erio had been missing for half a year and was found floating in the sea. She doesn't remember anything about what happened during that period of time, but she began to think that it was the act of an alien and wanders the neighbourhood wrapped in the futon. (Source: AniDB) **Note:** This includes the extra novel Denpa Onna to Seishun Otoko SF (Sukoshi Fushigi) Han

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Erio gets a new job.

A Sequel to How to Train Your Nice Aunt.

Meme let’s Makoto have sex with her every night, on the condition that he doesn't do anything to Erio.