Hikikomori Princess and Dokuzetsu Knight

Princess Rusty is a hikikomori – a reclusive shut-in. Edward, a young ace of the Knights, was given the mission to get her out of her room. He is extremely popular for his angel-like kindness, but his true nature is that he is a wicked man with a "venomous tongue"…! Rusty is at his mercy, the man will stop at nothing to become the Knight Commander, but what are his true intentions…? Being toyed with by the knight's loving (?) sharp tongue.