Soutai Sekai
English title: The Relative Worlds
Japanese title: ソウタイセカイ
Type: ONA
Source: Original
Episodes: 2
Status: Finished Airing
Aired: Apr 28, 2017 to May 5, 2017
Duration: 15 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Craftar Studios
Producers: Hulu, Lucky Pictures
Genres: Sci-Fi

The story is set in Japan in 2020. The story centers on Shin Hazama, and a version of himself who led a different life in another Japan appears. A crack opens in the everyday life that he thought was impossible to change. Boys and girls have to decide what to think and choose when the world changes completely. The battle with another world and another self begins.

(Source: ANN)