This tells the bittersweet story of two childhood friends, Snow and Summer, who were closer than anyone, so close that they never admitted the truth even to themselves: they were falling in love. Despite their growing feelings, they kept things strictly as "just friends", until a sudden twist of fate shattered their world.
A tragic accident leaves Snow with amnesia, erasing not only the memories of their friendship, but also the quiet affection they never confessed. Struggling to adjust to her new reality, Snow moves on with her life, completely unaware of the boy who once meant everything to her.
Years later, the two unexpectedly cross paths again at the same university, both in the same department. For Summer, seeing Snow is a mix of joy and heartbreak, she doesn't remember him at all. He's filled with longing but remains distant, too afraid to reopen old wounds. As they both graduate, Summer finds himself on the edge of approaching her, desperate to remind her of the bond they shared, but haunted by the fear that she may never feel the same again.
"Twice upon a Time" is a tale of lost memories, found feelings, and the kind of love that's written in the stars, or maybe just in the margins of a childhood diary. Because sometimes, once upon a time just isn't enough.