Shinjiteita Nakamatachi ni Dungeon Okuchi de Korosarekaketa ga Gift "Mugen Gacha" de Level 9999 no Nakamatachi wo Te ni Irete Moto Party Member to Sekai ni Fukushuu & "Zamaa!" Shimasu!

A character named Light is the sole human in a group called Legion of Races, where humans are considered the weakest race. His fellow adventurers leave him behind in the deepest part of a dungeon. To survive, Light uses a power known as Infinite Gacha to summon allies of the highest level. With these strong and attractive companions, he seeks to escape the dungeon and take revenge on Legion of Races.