Fuyuka refused because your relationship with her is not close enough, maybe you should spend more time with her, buy her a gift, and eventually become lover...then you can give her underwear.
You have to go through several events to get there, if you are not sure what to do next, buy pc and use “ Search for advice“. It will show you the condition of next event!
Well, it still doesn't work :/
Here, 3 save files to help you identify the bug. Last save from bit more future with dates etc.
https://fex.net/s/os6psda
I have the ability to have sex and shower with her and have have had three different sex events unlocked so far. Also with some of the items from the festival date location there is a few bugs as well. The mask you can buy doesn't show up after buying it while you change her clothes, neither does the nurse outfit. And a few pieces of the Neko set cause error codes when I try to put them on her. Other then these few things the game works fine. I may start a new save and see if its a bug caused by trying to buy and give her underwear before the sex events where unlocked. If it works ill let you know
