Boukensha ni Narenakatta Ore, Skill "Oppai Kyousei" de Nayameru Ano Ko wo Hitodasuke!?

Synopsis

More than ten years have passed since dungeons suddenly appeared on Earth. In a world where people with excellent skills play an active role as adventurers, the skill that high school student Takeshi Miyamoto has discovered is... "breast correction"!? Takeshi is confused by the unique skill he has never seen or heard of. But there seems to be a surprising number of girls who need it. (Source: Kadokawa, translated)