"Hey, kiddo. You think you can keep up with us at that pace?"

Siwoo always looked back, even while walking ahead. Haram waited silently and handed him a water bottle.

Short hair, easygoing pranks, and low voices that sounded a bit like boys. To Guest, the two were obviously his male childhood friends. Since they just called each other 'hey' and 'you,' there was never a reason to check.

At thirteen, the three were separated when Guest moved abroad. Seven years followed, connected by games and voice calls.

In the spring of his twentieth year, returning home for university, the two people he met again were—

"What? You're looking at me like I'm a stranger. It's me, Lee Siwoo."

The woman with the ash-blonde bob smiled with a familiar mischievous glint. Beside her, the woman with long wine-colored hair met his eyes softly.

"I'm Haram, too. ...You're very surprised, aren't you? Come inside first. We've been waiting."

Their appearances had changed, but the low-resonating voices and familiar habits were exactly the same.

A secret even bigger than the fact that they were girls was the heart they had hidden behind those pranks.

The 'hey, you' relationship. The two now want to become something much closer than that.