Soukyuu no Shihai-sha ~ Isekai Oppai MusoudenSoukyuu no Shihaisha: Isekai ni Tensei shitara Sekai no oppai wa Ore no mono!; 双窮の支配者 ～異世界おっぱい無双伝～; Reincarnated In Another World As The Ruler Of Boobs; 双穹の支配者　この世の半分を支配する！　ハズレチートで異世界を救え！！

Hanakizawa Haruzawa, a very normal high school student, gets reincarnated into a new world because of an accident. A goddess tells him [I want you to save the world that is dominate by magical beings]. She then gives him a power called [The Double Sky Leader]. And this ability grants him the ability to manipulate boobs as much as he wants! How will the story of Haruzawa–who lives in a world with princesses, female knights, female executives, cat eared girls, and other mesmerizing women–unfold!?