Even If You Don't Have a Third

"If I'm still single at thirty, let's get married!"

A playful promise made with a childhood friend in middle school. Time passes, and the year she turns thirty. Yeon-Hwa, who was about to marry her boyfriend since college, is shocked by the sudden announcement of their breakup. While walking down the street in a daze, she's hit by an oncoming car and wakes up to find her memories of the past ten years gone, her childhood friend acting as her guardian. Guardian? You're my guardian?

"Are we really married?!"

(Source: Naver, translated)