-Completed- She believes in True Love. He thinks love is useless. She finds out about him and wants to teach him the 'Love Formula' But what if he use's the 'Love Formula' on her? ---------- "Don't you believe in love?" "It's not worth it" "Jeon Jungkook, I, Song HeeJin, will teach you the Love Formula" In which she proves to him that true love exists. JUNGKOOK FF BY ZAMIDAMI