MTL - The Fake Daughter Can Be Either Salty Or Sweet - Chapter 2 The weasel pays New Year greetings to the chicken

The world’s worst offense, is called Love.

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

While reading a book, a sparkle of light disappeared. And, as it did, a message appeared.