On Twilight’s 18th birthday, Celestia decides that it’s time her young pupil stopped timidly holding herself back and learned about sex. As a ‘birthday gift’, she gives Twilight a more-than-willing guard and a very hands-on tutorial to get her started.

One gratuitously expansive sex scene split between three chapters. Each chapter ends with an orgasm.
Contains: F/M/F, M/F, FF, awkwardly adorkable first time, peach fuzz, using condoms successfully and as intended, overly helpful mentor, cum-swapping, ‘surprise’ lesbian horse-woman shipping
Cover image adapted from a comic by bakuhaku, colored by redoxx. (Artist links not available because NSFW.)