i don't know if this is a bug but a couple times it fast forwarded through dialogue mid scene and three times (so far) it locks in going up or down during freeroam after i do i do a bonus scene (meeting Io in the park twice and meeting Chef once.) If you're able to sleep with any of the girls (main or secondary cast) i might be doing something wrong because i've run into chef 2-3 times and after seeing her in Natural mode i want to sleep with her.
There are quite a few girls who have lewd scenes (both main and secondary characters) but sadly there isn't the option for one with Chef. Might be a missed opportunity on my part.
Regarding the fast forwarding, if you're playing on the web version sometimes the window can get deselected and input can get stuck.