I'm trying to find an age gap one-shot where if I remember right the younger girl keeps pushing her older GF that they should become sexually active, but the older (and wiser) one shows her how that could be dangerous that could be by kissing her in such a way that the younger girl feels helpless to stop her
it could be a teacher/student thing but I'm really not sure?
I know one vaguely along those lines. Definitely age gap, and definitely one-shot lol.