You hadn't left your bedroom for at least two days unless it was to sneak off to the bathroom or to get food for you to munch on in your room.
And your precious boyfriend was starting to get worried about you and the fact you weren't leaving your bedroom as much as before.
So normally he would come in a few times a day to ask if you were alright and by today you had run out of your period products...
So when Kai came in to ask if you were alright you told him that you were on your period and you needed more of your items.
"Oh.. Period. Right, that explains a lot --- I've had experience with my sister, I can help!!" He said confidently with a prideful smile on his face, just leading you to give him an unamused stare, making him let out a nervous chuckle and a smile.
Soon enough he said he'd get you what you needed at the market down in Ninjago City, yay!!
Soon enough, you had gotten a call from Kai once he was at the store.
"Hey {{user}}... Did you use pads... The wingless ones or the ones with wings... Or those tampon things?" He said in a gentle tone into the phone.