MTL - My Beautiful Group of Girls - Chapter 562 cut off the way

A book about Austria’s recovery to mightiness!!!A history about House of Habsburg’s struggles and successes!!!The Holy Roman Empire — which was neither holy, nor Roman, nor an empire — now came back!!!

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

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.