Hagure mono Saikyou Kuukan Mahou Tsukai wa Yome to Shizuka ni Slowlife Shitai

Neither human nor demon. Landros is a lonely half-demon persecuted by both sides.

He naively fell in love with Char, the only girl who has ever shown him kindness. And he was determined to put an end to the war that threatened her. Manipulating a wide variety of weapons with his rare spatial magic, he single-handedly defeated the evil demon lord! The strongest man began a slow life earnestly earning money to help his friends, even while being called a pervert and a weirdo (?)! He was happy to see Char again, but behind his back, his enemies were trying to use her as bait to lure him into a trap......

(Source: TO Books, translated)