The isekai cheat he gets multiplies all his abilities by 777. He finds out a bit into it that his lust is included in that, as well. And proceeds to plow multiple girls into the matress. A beastkin (known for stamina and strength) maid. TWO princesses that are also sisters. A cursed sword (odd story there, lol). The greatest merchant in the world. A lightning mage. Two sisters who run a restaraunt. A few times all of them at once, and they're still all worn out.
My favorite is the warrior princess known for being able to fight at full force for 24 hours straight. When she loses to him, their deal is that she joins him. She actually tries to solo his full lust, lol. The first princess teases her about being unable to walk straight the next afternoon.
His lust is so strong that the princesses actually recruit/create a 'maid' unit of 30 young women jus so they can have a break sometimes.