All the vibrations object they used are for pleasure and they do not hurt unless it's your first time inserting it in your body (speaking from experience lol)
I want to try it on my boyfriend we want to spice things up but it’s his first time and I’ve never tried anything like this before It’s scary and exciting at the same time I’ll try it anyway lol
Id look up actual info about safe kink play, fiction is fiction its not always accurate to reality
It's safe but a lot of these toys are available only in Japan or in very deep niche stores because they are freaky (some mangakas work with sex toys even). Also, you need a lot of preparation and experience, so it's better to start with sounding and those toys to massage the prostate from the ass and slowly go up
Real question
is this just fiction or can my boyfriend and I try this in real life? I’m afraid we might get hurt but it looks like so much fun