Real You [M!Reader X TWICE Sana]

"Please.. Where's The Y/n I Love? Where's The Real You Y/n?" "I Killed Someone For You. The One I Killed. Is The One You Loved. My Old Self. Changing Who I Was To Who I Am Now." Y/n, A Nerd Of The Highschool, Falling In Love With The Most Beautiful, Popular Girl, Minatozaki Sana. But Things Changed When Someone Appear...