Akuyaku Kizoku ga Hirakinaotte Hametsu Furagu o Jitsuryoku de Hataki Otteitara, Itsunomanika Hirointachi Kara Eiyūshi Sareru yō ni Natta ken - Chapter 3.3

3 years ago? no you forgot your own story already? 3 years ago he got reincarnated he was still weak and training himself he killed those guys 2 years ago after a year of training