In The DC World With Marvel Chat Group - Chapter 27: Gang Conspiracy

Arakawa Kouki is reincarnated to a Japan with a different history than the Japan he knows with the memories of his previous life still intact. Kouki was discouraged, “Aren’t reincarnation stories supposed to be at some fantasy world filled with swords, magic and elves?!”

The previous life is nothing but a joke. Being used completely then abandoned mercilessly. How can I be this stupid to not even notice such an obvious scam? Fortunately, I can have a second chance with my rebirth. Sister, Brother Yi and whoever mistreated me in my previous life, are you ready for my revenge and the counterattack of a princess?

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

A tale of transporting to an alternate world! Let it be so, but why did she turn into a dragon?

As the last dragon in this world, Yi Longlong became the target of the dragon knights, but why are they competing on who gets to ride on her back?

She’s only a young girl who hasn’t even been on her first date!

Are good looking men so remarkable? Just because they’re good looking doesn’t mean they can ruin this beautiful innocent girl… Dragon?!

- Description from Novelupdates