The only GB novel I have ever read, Honest Secret Guard × Lustful Princess, it contains all kinds of props! ! There is also an R-ring, I don't know if it's like this for all GBs or this is it. Anyway, the meat is very fragrant, but it's a bit too cruel to the male protagonist. I was heartbroken and couldn't stand it anymore.
The book is interesting. The yandere male protagonist was pretty good before his rebirth. After his rebirth, the male protagonist's reaction was too bland... I feel like this plot setting was wasted.