異世界帰りのアラフォーリーマン、１７歳の頃に戻って無双する (Associated Names)

A black company employee in his 40s, Namba Kazu, died of overwork and was reincarnated to another world. After saving the world, he returns to find himself regressed to his 17 year old self. Kazu realizes that he can use the abilities he acquired from another world and is excited to restart his life over…