So the trope "I'll fuck with you, so teach me to be an adult". Man, Author just looking in the hentai for this arc
last time "man, I hope this girl will be saved. She's a victim of idiocy". Now so because rinta doesn't pickup his phone (obviously low bat...wink wink author), she decide is fate that guide her here to be an adult before returning to Rinta, after being gaslighted in the worse manner ever. She's beyond the stupidity like the others.
She has been convinced by hearing people, under the effect of alcool and whatever they've smoked, that is cool and not frightenning.
She's beyond saving too. Like everyone in this manga (if it's not a bait and they do the deed, I bet the Author won't spare us with the now she's his pet).
But well, everything to boost the sell I think.