So I have been seriously looking for this particular yaoi for a while now and frustration has me by the noose and I need help!
Here is what I remember about the story.
First off I am almost positive it is from a collection of oneshots (don't hold me to that though). The story is about a young boy who's mother commits suicide after the man she was supposed to marry turns his back on them and marries a woman ordained by his family. the mother was the only family member the boy had left and at the funeral he yelled (quite hysterically) at the brother of the man who was supposed to marry his mother and said that his brother killed his mother. the brother then takes in the boy and raises him (but has feelings for him). I also remember a coworking bring over a smoothie maker because the boy was being picky and somewhat distant with the uncle(?) does this sound familiar to anyone?

Is it chapter 5 from Kimi no Iru Sekai Shikairanai?

tackles happily THIS IS IT!! OMG thank you! Seriously I was looking for this for way to long but now I get to read it again!! I love stories like this. Wish I could find more like this only where they show us the reaction of the ex fiancé where he shows regret for what he did (muwahahahahaha) but that's a quest for a later date (lol). Again thank you Aerith!