I tried again and maybe it will take.

Yep, in the video I count 7 but Steam hasn't let me edit the image since upload.

There's 7 spots to open in Guest Bedroom 3, not 6.

I had to make a new save to get the achievement. Searching is not necessary for this for anyone wondering

You can also access all cupboards in the kitchen after the dinner call, but before entering the dining room 🙆‍♀️

Thank you so much for the guide! I really appreciate it!

Important note: Yes, it has to be the command OPEN. I looked up this guide because I've been doing it all with SEARCH because I thought it was more expedient, but seems the programming is checking for whether the command OPEN was used, so make sure to use OPEN!

Also, just confirmed, Ice Box is NOT part of the opening cupboards and drawers. It seems if an object isn't classified as CUPBOARD or DRAWER, it doesn't count.

Thanks again for the guide, now I just gotta make sure to OPEN everything else in the other chapters!

For those wondering about the required story events:
- Check out Servant's quarters AFTER dinner but BEFORE helping with the dishes
- Check out kitchen AFTER helping with dishes