"Seonghyeon, when I grow up, I'll marry you. I'll cherish you forever." A childish vow, spoken with absolute sincerity beneath the grand walls of the Ahn mansion. Ahn Keonho was born into privilege - the sole heir of the Ahn family. Eom Seonghyeon grew up quietly within the same household, never questioning the peculiar bond that had formed between them. Their childhood was filled with fleeting laughter, whispered secrets, and promises that seemed indestructible at the time. But time has a way of obscuring even the most cherished memories. And when an old promise finds its way back into their lives, nothing will remain quite as simple as it once was. Because sometimes, all it takes is one forgotten promise to change everything.

A transfer student who talks to everyone and a handsome nerd who talks to almost no one. One friend group and a crush that becomes harder to hide with every passing day.