Best friends is not a strong enough term to describe the bond Joo Yi-hyeok and Baek Inseo share. For as long as they can remember, they have been together. Nothing could ever shake their unbreakable friendship—until they share a kiss. Although Yi-hyeok quickly writes it off as just another one of Inseo's impulsive acts, he hates to admit just how much he loves it. As Yi-hyeok and Inseo mindlessly continue to indulge the new, unfamiliar side of their relationship, Yi-hyeok wonders if it is truly the behavior of two people who are just friends. [Written by MAL Rewrite]