Reincarnated as the Baron's son: My Infinite Card Upgrade System - Chapter 12: A knight’s trust

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

Wake up to Marvel and become a latitude demon between existence and non-existence. In order to disrupt the real dimension, the nihilistic demon summoned players from the unknown dimension!

In New York City, [Black Hand Wallon] re-enacts the shocking heist, this time targeting the playboys of Stark Industries!

Hell’s Kitchen has opened a new home [Xinhei Dingjiu], and at the same time [Dark Cooking World] is trying to control the world with taste!

Jinbian ushered in a new enemy, and the Italian “evil” party named [New Pengliel Family] is expanding step by step!

[Miko Kikyo] living on the street met the fearless people of Hell’s Kitchen. While investigating the lost shadow case, what kind of sparks could they create!

- Description from novelbuddy

Born of a great family, world shaking genius.

In this fantasy world, music and aether rules all. However, there is constant threat of demons and natural catastrophes. The most powerful men are musicians who use music, alchemy, and spells to safeguard their homes. A young man who just wants to find his father and know why his family was exiled, starts his journey of becoming musician – a journey that leads him to the crown of justice and glory.We are born of aether, grow under aether and die as aether. Awe of Aether! – Holy Code.