Soutai Sekai
English name: The Relative Worlds
Genres: Sci-Fi
Type: ONA, Episodes: 2
Aired: Apr 28, 2017 to May 5, 2017
Studio: Craftar Studios
Source: Original
Rating: PG-13 - Teens 13 or older
Synopsis:
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)