Devil lovers fanfiction

[Who are you? ] [Is it so necessary? ] A young girl suddenly appeared in their lives, [Why protect me? ] [Agreement... Nah] And why does she have the breath of the devil world? [what is your purpose? ] [I can't tell you now, but I will know later...] The girl's plan was arranged by someone? [Because the agreement must be kept...] The girl came to protect someone?but something else?Lian Weiwen, who was brainstorming all the time, what is the girl's plan?Stay tuned!