Got 10/10. I figured out 8 hints and guessed the first 2 correctly. Now I know 9 of the hints, and I don't think there's a 10th one (hence saying you need a little luck). For those of you trying for 10/10, don't. It's not worth it.
Viewing post in Sexy Psychic Power Test at Lewdston University comments
Giving the answers outright seems against the spirit of the thing, but I did spend more than a couple of hours figuring it all out, so I'll try to give something so others can avoid the same fate.
When Robin asks if you're listening, that's not just idle chatter. Everything that makes a sound is related to a hint in someway, and the sound itself is a hint for one of them.
Some hints will tell you what the card being held is, others will tell you of cards coming up. It'll be trial and error to figure out which is which.
The flower actually has two hints associated with it, be observant and try new things.
I believe there are only 9 hints, you'll have to guess one (though again, the 10/10 isn't great). If you're determined to completely clear it, I recommend figuring out the 9 clues, then guessing the first and resetting until you get it right.
Hopefully the dev doesn't get upset I'm helping out, but as in the game itself, sometimes cooperation is key ;)