天晴納涼!! ふんどし刑事, Appare Noryo!!

Protect your sister from a pervert monster! There was a hero who remodeled his body and fought against the rehabiliters who gained perverted abilities. The face of the day is a detective, but he remodes himself and fights against the rehabilitation. His name is "Detective Fundoshi". And his other face is his brother's brother. Battle today to protect the perverted person from my sister!