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It'll unlock eventually, just interact with her with what you can, eat, sleep, and you'll progress naturally. There's also a hint bubble in the top left of the screen that'll hint to what you should do next.

Saving at the "living room" screen is problematic currently, I've lost a few saves to this myself, I save outside on the street usually.

Also, don't save in the "living room," the main screen where the player lives; it's problematic to save there.

There's a hint bubble in the top left of the screen, check it periodically to see what's required, other than that, just play normally.

Check that you don't have an adblocker running, or the Brave browser, the link doesn't seem to work with those, try just Chrome, that worked for me

Might have found a bug, Aku is asleep and has been for about three straight weeks, I have the option to buy the ampules from Dr. Hal, I've gotten his dialogue about her sleeping too long twice, and have bought many of both sets, singles and 5 packs, and I still don't see the option to help her wake up, I even tried the "H" option, but that doesn't seem to fix it either, straight up sleepin beauty over here.