post 'em
I'll start

A Nijifan's step son decides to marry a vtuber

So he decided to teach his step sin what to do on his wedding night:

"you must kiss her strongly to prove to her that a Nijisanji fan is passionate"

"You must carry her up the stairs to the bedroom to show her that a Nijisanji fan is not afraid of hardship"

"You must rip away her clothes and throw her on the bed to show her that a Nijisanji fan is strong!"

"Then you must masturbate alone in the corner while watching her having sex with another man to show her the true spirit of a Nijisanji fan"