Isekai is cooked. Same world, same monsters, same nigga wit black hair and a black cloak. One good one is Nigoru Hitomi de Nani wo Negau - Highserk Senki (https://mangadex.org/title/418be4a0-a376-4a7e-aa34-51576b2e6fa7/nigoru-hitomi-de-nani-wo-negau-highserk-senki) and some other gems ive found...