Useless Concubine Turns into a Genius

I can still travel through time just by taking a bath and falling asleep. . . Not only that, she is a good-for-nothing concubine. . He is a killer who knows what is known and is good at daring. Alas, I reluctantly accept it. But she will get married in a few days. . Still a fool. . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.