Futago Kissa to Akuma no Ryourisho

Kagari has loved Hazuki since childhood but has never mustered the courage to confess. He now works part-time alongside her and her twin sister, Mizuki, at a coffee shop. One day, a clumsy fairy named Kiki emerges from a book and announces she will help Kagari achieve his wish. Without his consent, she connects his love line to Mizuki instead of Hazuki.