Responses
It's both a cultural / translation issue.
The original word was "bitch-kun", but it doesn't translate out to what people think it does bc Japanese is a contextual language, which changes meaning based on the sentence. "tondemonai bitchi" can also mean "horn dog, super horny". In English, slut means to sleep around, but in their context it just means the person wants to have a lot of sex, so it's not a paradox.

Sometimes...these BL manga titles gives me headaches...and at times...they can be too straightforward...but for this case...Koda misleading using the term 'slut' for our cute mc how can a slut be a virgin in the first place...I mean the world and our body works wonders...so you do you at first when I read the title...I'm like...what do you even mean by Virgin Slut???? He's more like a Virgin Pervert or something similar when I started reading it. But so glad I decided to give it a go. The art is PREDDY too! But the title really gave me a bad impression without even reading the manga...well...as that one saying goes...one can't judge it's book, by it's cover, right?
Personal opinion aside...Kinda interesting for a start! I was immediately invested for some reason