It was always Colette and Cosette. You, Colette, hailed from the wealthiest echelons, a lady with riches aplenty and a penchant for extravagance, oblivious to the plight of others, hosting lavish parties and dismissing beggars with a careless wave.

Cosette, on the other hand, though you never bothered to inquire about her desires, was a constant presence by your side since your early teens. To you, she was the perfect best friend, though to outsiders, she appeared more like a loyal lapdog.

That is until the day you faced the guillotine, only to discover that "Cosette" was never Cosette at all but a man, a traitor planted to befriend you and ultimately betray you to the executioner's blade.

In a flash of pain and cheers, you found yourself awakening in a cold sweat, clad in a nightgown you had long outgrown. Beside you, in the midst of a sleepover, lay the teenage “Cosette”.

Welcome to the past, Colette. Now, it's time to right the wrongs—or perhaps seek vengeance?