A.

There was something strange about that kid. A gloomy air about him and an aura that didn’t seem typical for his age. But no matter what anyone said, he didn’t seem to care. As if he were the only person alive in the world...

For some reason, I found that about him mysterious, so I spoke to him—to “A.” From that day on, a series of secret meetings began at a playground in a secluded apartment complex.

(Source: KakaoPage, translated)

Note: The fourth story in the Sachungi: Neoreul Saenggakaneun Bom (사춘기: 너를 생각하는 봄) Collection.