Live a quiet life, going unnoticed and avoiding criticism, that’s Ken’s goal. In order to do that, he always hides his real self: a pessimistic guy who’s also a big anime fan. Two things he’s ashamed of. Because of that, he's always acting like somebody else.

But his quiet life comes to an end when the dream of every otaku materializes in his apartment: his waifu incarnates in the real world. Mirena, the co-protagonist of a famous fantasy light novel series called Sekaunmei, finds herself in the real world for an inexplicable reason.

Both will have to learn together how to overcome the difficulties of this new life they are about to live.