Iridatsu, Yuuta

伊里達遊太

The protagonist gains superpowers by looking at panties. However, if he sees panties more than once, the world is destroyed by a meteor.
His name is a pun on "yuutai ridatsu." "Yuutai" means "ethereal body," and "ridatsu" means "withdrawal," so his name refers to the separation of his spirit and body.

Spoiler