I first thought of this one but I gotta double check:
https://www.mangago.zone/read-manga/love_is_an_illusion/
ok so I checked & ch 25 is when he hides in the closet but he doesn't say that so this one might not be it...
that ones not it sadly
https://www.mangago.zone/read-manga/kiraide_isasete/
I think this one had a scene like that when the alpha was ok business trip??
*on a
already found it ty
idk wether it’s a manga or manhwa but one of the scenes was the omega trying to nest but instead of them taking out the clothes to build a nest they sat in the closet
said something along the lines of “they all looked too expensive”