HP: Blue Hydrangeas and the Viper

Also known as The Story of Getting Madly Loved by a Powerful Man After Cosplaying and Transmigrating. Some original worldbuilding will be included.

Both are pure. Two male leads. One-on-one. Bottom-focused. Voldemort-wins setting. (Some characters who died in the original will survive, but having everyone survive wouldn't be realistic.)

Brooding, rational (?) old heartthrob mob boss Voldemort vs. Tom, a lively little painter who occasionally gets depressed.

Little Tom is somewhat charming, but he's not a lady-killer, he's really not.

Little Tom isn't a saint. His ambition and dark side are no smaller than the Dark Lord's, but they haven't been brought out yet. Still, there's no denying that deep down he's kind by nature.

After finishing the last touch of makeup and fastening the last silver button, he had just slipped on his shoes when he opened his eyes and found himself on a street with a distinctly British feel.

How strange. Had he finally mastered teleportation?

No, that wasn't right!

That wasn't teleportation at all. A dismayed Tom realized he'd transmigrated to twentieth-century Britain.

So he'd really transmigrated just like that, in the blink of an eye!?

Even more terrifying, as he unconsciously waved the wand in his pocket, a tiny flower floated up right before his astonished eyes.

[Please Note]

The bottom is physically transported, not soul-transmigrated. The big boss and the pairing are both old Voldemort.

You can read it as selfcest, or as sparks between two completely unrelated people brought together under inexplicable circumstances.

The author is pretty easygoing, so please don't be a troll.

The bottom is an art student. Due to childhood events, he stopped growing at around 176 cm; this will be explained in the story.

The whole story has a light tone, but also leans toward extremism and darkness. Neither of the two main characters is a good person. Tom is bad only in an incomplete sense, while Voldemort is completely...