The you of the past and the you of the present

The main characters, Yeo-ju and Kang Daniel, were best friends since they were young, to the point where whenever Yeo-ju or Daniel's name was called in the neighborhood, people would say, "Ah, that guy who hangs out with Yeo-ju/Daniel." However, they had a falling out in their second year of middle school due to Daniel's move, and just as hearts grow distant when bodies grow distant, they stopped contacting each other. They each got girlfriends and boyfriends, but Daniel got along well with them