how tf do i progress further?
There are a couple new scenarios and scenes added.
One of them is highlighted on the screenshot above Pinku himself posted (don't mind that the card is "Blank", it works alright).
I also found a new scene with Magnolia using the Magnolia card in "ZZZ" mode (which is unlocked when walking around with Magnolia: talk to Daisy, then to Lovegoat, then find the Professor going to the right, get back to Daisy in house and then find kids going again to the right and getting back to the house).
Using the card you get to the part where you go swim with Nana but then get back to the house: then, instead of previously "WIP"" part you choose "Professor" card at some point and get the scene (Boy card leads to WIP, so no point in trying that one).
I also think there is an additional one if you use Magnolia card but this time go "Daisy route" and join Nana to swim, although it is not particularly explicit.