@Mistermd monster uses a perverted boy to deal with magical girl by sealing them in a room powered by his desires, so all his fetishes get materialized, etc, she slowly becomes a pervert too horny to fight monsters.
@memyselfandI Got ya thank you dude! So I assume that the boy at 223 is an hallucination too, probably her crush or something, created so that she hates the sex with him and fully gives to the monsters?