Okay, this is going to be a short and simple guide.

There are two endings in this game.

If you grant all of Ethan's wishes, you'll achieve ending 2.

If you don't grant his wishes, you'll achieve ending 1.

I recommend finding both endings because the outcome is very different. 

Hopefully, it's easy to find things at the supermarket. 

If not, report it to me, and I'll add it in the guide.

If you have any feedback, let me know!

I hope you enjoy playing the game!