Isekai Haramase Harem -Guild de Ichiban ninki no Bishoujo Party o Kyokon de Masobore sasete Chinkobi otsukushi saremakuru Bouken Seikatsu | 異世界孕ませハーレム ～ギルドで一番人気の美少女パーティーを巨根でマゾ惚れさせてチン媚びお尽くしされまくる冒険性活～

The protagonist serves as the porter for the strongest party, which boasts idol-like popularity. The party members are all young, voluptuous beauties, but each has a strong personality, and the protagonist spends his days being toyed with, while also feeling aroused.

One day, they are attacked by Luvelia, a beautiful female executive of the Demon Lord's army, and the strongest party, unable to coordinate, is defeated. During the retreat, the protagonist is left behind, falling into a desperate situation. However, at that critical moment, his skill awakens, and he acquires a cheat skill that allows him to restrain opponents indefinitely, successfully escaping danger.

After escaping, he complains to Valtia, one of the party members, an arrogant noble lady, but she shows no remorse. Infuriated, the protagonist activates his cheat restraint skill, determined to vent his accumulated frustration! He sexually exploits her to his heart's content, debasing her into a loyal sex toy.

With that momentum, he indiscriminately restrains and debases all the strongest party members, and even executives of the Demon Lord's army, forming an ideal harem party of submissive and erotic sex toys! Thus began his days of enjoyable adventures, filled with endless sexual encounters.