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.
| Title | Time | |
|---|---|---|
| 1 | City of Aliens | 2011-04-15 |
| 2 | Reverie of My Disappearing Adolescence | 2011-04-22 |
| 3 | A Strange Moment for the Girl Bound to the Ground | 2011-04-29 |
| 4 | One Month to Mend a Broken Right Arm | 2011-05-06 |
| 5 | The Melancholy of Thanksgiving | 2011-05-13 |
| 6 | Ryū'ko'-san's feeling... kinda... glum... | 2011-05-20 |
| 7 | A Day Someone Will Remember | 2011-05-27 |
| 8 | Tsiolkovsky's Prayer | 2011-06-03 |
| 9 | Region Limited Alien Incident | 2011-06-10 |
| 10 | Overhanging Deck Girl | 2011-06-17 |
| 11 | This Summer is about Basketball and Espers and Futons and As | 2011-07-01 |
| 12 | 0.00000000198 Centimeters Per Second | 2011-07-01 |
