Return of the Demon Emperor

The mysterious boy who returned from another world and hid in the mortal world opened a strange and inconspicuous shop in the corner of the noisy city. It was never open during the day, but the door was open at night, but there was never a lack of customers. A pair of couplets on the door showed the extraordinaryness of the mysterious boss. The first couplet is about a horizontal sword that shakes the world, and the second couplet is about a mad sword that only respects me... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.