A girl (Miku) attends a ball to kill the prince (KAITO) when the clock strikes twelve, since she was handled by the fairy godmother. As the girl and the prince meet, they dance together and fall in love. The girl becomes increasingly conflicted as midnight approaches, falling into a dilemma as she does not want to kill him. Eventually the girl stabs the prince when the bell rings. The final lines of the song discuss the moment right after the prince is stabbed while she can still feel him with her, and muses on how they want the moment to last forever.
The PV is very ambiguous and can be alternatively interpreted as Miku having a split personality, and the "darker" side stabbing KAITO while the "good" side cannot stop it. This, added to the open of the lyrics and the popularity of the song, had generated numerous PVs with different interpretations.
A Kagamine version of the song, "Adolescence", was uploaded in their first anniversary, which became relatively popular.
An aesthetic PV with a lolicon vibe. In it's plot a witch or dark fairy godmother (represented by Luka), sends an assassin to kill the prince, who used to be her childhood love interest.
Hatsune Miku and KAITO
An Alternate Ending PV where Miku's stab only barely scratching KAITO, thus allowing him to survive, and finally displaying KAITO and Miku running off into the distance together. The original vid was deleted due to reprinting on YT
KAITO and Kagamine Len
Parody; VOCALOID Cover
A parody of the song, in a very similar vein to Shotarella.