She is her shadow ~diabolik lover x reader~

(Y/n) (l/n) goes to the Same school as the sakamakis and mukamis .She has an older sister who goes out with reiji . But (y/n) has something that her sister doesn't . What is it. (Y/n) is stunning even more so than her sister . What is it that y/n has that her sister doesn't after all her sister is the one who gets everything and (y/n) survives on