Yuuto is sent back to modern Japan, where he's forced to make a choice: stay there with his beloved Mitsuki, or go back to save everyone.
You'll have to do a whole lot of things 
you wouldn't in the modern world.
Du wirst viele Dinge tun müssen, die dir
in der modernen Welt erspart bleiben!
Tu devras t’adapter
pour vivre à leur époque.
Dovrai fare un sacco di cose che 
non dovresti fare nel mondo moderno..
Você terá de fazer várias coisas
que não faria no mundo moderno.
Нужно делать много того, чего 
не нужно в современном мире.