Sometimes the secret to these magic gems are hidden in books, and it seems Kei just unlocked their power on her lucky college boyfriend. I am sure he wont mind

Bit of backstory, I have a rather large story WIP that explores Kei, Ash, and Jenny in college, featuring Kei getting her first real go with a full powered gem. This scene is the first time she uses it, and the idea is that since the gemstone is first used on a willing victim (She knows Ash is subby as hell for this stuff), it unlocks the full power of the gemstones for further uses. Poor Jenny~