Go to hitomi.la and look there(if you want online). Just type in feet or whatever type of fetish you want. They have cg and manga aswell. Can recommend euphoria, and violated hero series. Specially violated hero is more of the submissive side, while euphorias is dominant.
Euphoria has 1 scene with tickling. The game offers a veriety of fetishes, from piss, shit, tickling, feet , latex , gore(low) etc. Can higly recommend, even on english aviable!