Isekai Affair ~Ten Years After The Demon King's Subjugation, The Married Former Hero And The Female Warrior Who Lost Her Husband is a Manga/Manhwa/Manhua in english language, Ecchi series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Yuta Shimabara, who was run over by the truck, reincarnated in a different world as a hero and subdued the Demon King with unrivaled power!── Ten years later, what he has to show for is a mediocre and hard-working daily life.However, the forbidden love with the female warrior Lucas, a member of the Demon King Subjugation Party, heats up ...!?