Illusions of a Promise (слэш)

They made promises to each other as children, holding each other’s hands as they stood in the middle of the frozen lake near the palace. During the night of a devastating attack that resulted in death, grief and their separation, Yuuri was torn from Viktor’s arms in a sea of red.
The fairy-tale of a life they had became nothing but a faded memory, washed away by the twisted story of their reunion in a future where neither are who they used to be.
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"It was supposed to be a fucking happy ever after for you and him. But it's a shitty world and that's not your reality. It didn't happen like that."
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Also in Portuguese: Ilusões de uma Promessa by JunoAlBoo
Also in Russian: иллюзии обещания by nxrrie