This was good. So often in stories where the focus is on the male character the sex will start and the girl will have a line about how she "practiced" for that moment. This is one of the few times we actually see what "practicing" for sex looks like from the female perspective. The only other story like this I can recall off the top of my head is "Kogal Holes" by Puyocha.
"Step Up Love"
I misread the title and though it was a hentai about two dancers who come from two different worlds, who fall in love?
... This is nice as well! â•(๑ ॔ㅂ ਂ ॓)Ùˆ Ì‘Ì‘
Well, what a nice friend she has, telling her all about the secret to happy, sweet Vanilla filled sex.
I must say though, he's pretty lucky to have such a dedicated girlfriend. And of course, like a good boyfriend, he should train himself up too!
DAYUM! ... If "Senpai" decided to *cough-cough* "train himself sexually" as much as Shiori did, the resulting sexy time just might be Too Hot Even For FAKKU.