Tensei Kenja no Yarinaoshi ~Ore Dake Tsukaeru Kikaku-gai Mahou de Nidome no Jinsei wo Musou suru~

Tensei Kenja no Yarinaoshi ~Ore Dake Tsukaeru Kikaku-gai Mahou de Nidome no Jinsei wo Musou suru~ is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on the fastest updating comic site. The Summary is

Once, there was a great sage who sought power and became the strongest in the world. He faced the Demon Lord in a final battle to claim the title of the strongest... but the Demon Lord escaped using reincarnation magic. To settle the score, the sage also used reincarnation magic to follow. However-

"As a man, you won't be able to use magic."