Kabeyaku nado Fuyou to Tsuihou Sareta S-kyuu Boukensha, «Dorei Kaihou» Skill wo Kushi Shite Shijou Saikyou no Kunizukuri

Follows an adventurer who was kicked from his party after his partymates said that they didn't need a paladin to tank damage for them. When he decided to make his own way as an adventurer, his defeat of a monster gives him a unique "slave release" skill that instantly releases and teleports a slave somewhere in the world to him. Thinking that using this skill could only be good for the world, he uses it repeatedly and summons talented and beautiful women to him that would soon help him build a great country. Source: ANN