Teasing ryuko doesn't increase her horniness, instead it increases kaoruko's horniness, making it impossible to advance further into the game.
Hey, thanks for reporting it, just checked, game was using wrong notification. Event still increase Ryuko's stat, so you should be fine
It's working! It just felt a lot slower than for kaoruko😅
Almost all girls have "wait a day and then take a walk outside" as their mission, but if I do so, nothing happens
Really old bug, fixed by restarting the game or loading a savefile where you didn't get that quest yet