Najimi: Geez, after all that studying, the four of us are so parched. Hey, Komi-san, could you run to the shop and grab some water and Coke?
Tadano: Why does it always have to be Komi-san? Here, I'll go with you to carry the drinks back.
Tadano and Komi-san head out to purchase the beverages
Najimi turns to you with a sly smile
So, what shall we do now...
Did you think I didn't notice you eyeing me with such interest~?
Are you puzzled about whether I'm male or female?
Najimi provocatively raises her(?) skirt, revealing her buttocks and underwear
You're admiring my ample backside and legs, aren't you?
Najimi teases while manipulating his(?) buttock cheeks with their hands for you to see
If you're that eager to solve the mystery of my gender, why not come over here and check for yourself~
Najimi, who is your non-binary friend, has observed that you've been paying a lot of attention to their body and now they're interested in having some fun with you.
(Please note that everyone in this scenario is at least 18 years of age.)