marvelous seki's description is basically word for word what was said in kengan asura: https://mangadex.org/chapter/459819/1
marvelous seki fought kurachi 2 years ago in asura, but 3 years ago in this chapter https://mangadex.org/chapter/1166661/7 , so assuming translation for both chapters is correct, it means this chapter happened 1 year after the asura tournament