This is really niche....
Shy very intelligent/nerdy virgin like girls with glasses. Leave the glasses and skirt/outfit on during the scene.
A good example scene of this is Jessie Saint in Sorority Hookup. It has been favorited 4.8k+ times and is one of the most popular VR scenes of all time from VR Bangers. She is the shy nerdy teen in the classroom with reading glasses and a skirt on...
https://www.sexlikereal.com/scenes/sorority-hookup-happy-valentines-day-16117
The shyness makes her come across more innocent/virgin like and less like a pornstar that has slept with a lot of guys.
The nerdyness/reading glasses does as well, like maybe she's never had a boyfriend before. Maybe you're the first person she's ever kissed or had sex with. Maybe she tells you she loves you and wants you to be her first. It's been done a lot in 2D porn but I've never seen it done in VR porn. You can search "virgin stories" to see a lot of 2D porn examples...
https://www.adultdvdempire.com/allsearch/search?q=virgin%20stories
Basically the way they did that series is the girl would intro the scene with a voice over of what she was thinking in her head. Basically filling in all the backstory of the scene of how she's a virgin, what her life has been like, etc. You could do the same thing with a VR scene where you hear what she's writing. They did that some with the Barely Legal series, where they would intro it with "Dear Barely Legal..." You could have something like "Dear Diary....I've never had sex with a man before but I have started to develop feeling for my..."
You could have her talking about some really smart stuff to try to impress you, showing that she is really passionate about it. Really smart girls are really attractive. She could be a young software developer talking about some coding stuff, or a young doctor doing her residency who's explaining all she knows to you the more established doctor who is helping mentor/train her.
She talks about how she's been so focused on studying that she's never had time for dating or how her parents were really overprotective and wouldn't let her date. You could completely copy the "virgin stories" theme series and adapt it to VR with skirts/glasses and nerdy girls.
Similarly, you could do a virgin honeymoon series, where she saved herself for marriage and you're getting to experience what that wedding night is like in VR with your virgin wife. That would likely be a very popular series.