Sure, Resort Boin (a no brainer, best imo), Black Bible (if you don't man weird stuff sometimes), Eroge H mo Game (This one is special) My three big and horny sisters (the title is self explanatory) Love is the number of keys, Nozoki Ana, Lover in law and Bust to bust..... All of this material were found under research only....
Damn anything coming from Japan is expensive af so imagine how much money his dad spent on hentai well unless hentai is cheaper since they have a much smaller budget than anime but it's probably still a sizeable amount
Nevermind that shits still expensive af, I saw a disc for $18, like bruh I ain't paying that much for porn when you can watch it for free on the good ol interwebs
When your parents know your kink.
Dad: Merry Christmas Son
You: Dad this is hentai
Dad: what-tai?