@I like it inside my mouth Try Mao No Hajimekata its a po** manga and the plot is
The mc is an old man who was exiled after the death of his female master after that he calculated and found a mana vein and is now youthified and became younger and summoned a succubus in the underworld and he fuc*** her and then he found some people and he fuc*** them too and he found a elven princess and her human husband and then he ntr the guy while fuc**** the princess for a week straight and then he found a cheating queen and a princes he fuc*** both of them too and some more girls along the way that i do not remember but he fuc*** them too