Will the Demon Lord Use His Sword Today?

Just as Xia Youqing was about to attain immortality, a bolt of lightning struck her back more than ten years ago and turned into a sword that would not end well. It doesn't matter if she's not a human being, now she has to face the evil demon king who will be notorious in the future. But no matter how she looked at it, this Lu Shi was just an innocent boy who was bullied. In this case... "Lu Shi, I'll protect you, how about you be a good person?" "... Okay!" Later, Xia Youqing pushed and pushed Lu Shi who was holding her and wouldn't let go. She really wanted to go back and slap herself twice. What kind of brain twitch did she have to think that this person needed her protection. ………… "Boss Lu, is this your natal sword?" "No." "Oh?" "My life." The mean-tongued and gluttonous little fairy*the black lotus demon king with mysophobia Shuangjie, 1V1, feel free to invest!