How to get footjob skill and other hidden lewd skills?

[Hoshi]

I can't seem to unlock the footjob skill. Is it bugged or is there a requirement? Any other hidden skills that also hidden like 'Golden Enema'? Thanks

[Heavy_Elite]

You can get the Skill, from playing the Sylvester Event Minigames and get the Max-Score. NOt sure anymore which one, but you need to reach the 1st Score Point level. And yes, it is possible, but you also need to train that. Will take time, but its not impossible.

[Hoshi]

Thanks. I was actually able to obtain it as well as other skills from the late night shop.

[Orange Guise]

Footjob is unlocked from the "Enthusiast Magazine."
Earn it from the Lottery in the shopping district.

You will first need to win the Menko skillbook.
You can also buy it from the Secret Shop, as you noted.

After unlocking the 4th skill for each category, a 5th skill will be available to unlock.