I woke up one day...and became a trap!?

An overworked 28-year old salaryman meets a girl who is moving to his apartment building. They start falling in love, but it turns out she's actually a demon, and not only that, she's married to one of the most powerful Demon Lords!

Haruka Miyake is chosen to marry a girl among those in the project, but it is not what she expected, since the girls all are monster,among the girls there is a centaur yandere, a kuudere dullahan, a kind cyclops, a gentile tanuki and a succubus. But after this, someone tries to kill Haruka. Haruk...