In order to repay the kindness he received in his previous life, he resolutely decided to marry on his behalf. Anyway, as long as the bride he pretended to be died after a while, no one would ever know about it, which was the best of both worlds. But the plan can never keep up with the changes, and when the love is deep and the fake one is real, it's too late to regret.
You have always told yourself to leave, but you still can't let go - there is a person who, although he has some flaws, takes great care of you, trusts you completely, and treats you with all his heart... Although the human-monster is separated from you, all monsters are not heartless, so how can he let go?