How does it feel to fall, my precious angel? (слэш)

Harry Potter is a Light Angel and also known as Dumbledore’s Golden Boy, because of the fact that he had never giving into Voldemort’s advances.
20 years ago, Tom Riddle, Harry’s partner disappeared and rumours stated that Tom Riddle had fallen, became a Dark Angel. Harry who had secretly harboured feelings for his partner is devastated, but what happens when Harry returns after 20 years? Will he finally make peace with his past? Or will the images of Tom Riddle never let him go?