A yaoi manga i cant remember?

im looking for a yaoi manga and i cant remember the title of it. it was a story about two stepbrothers who came together because their parents remarried. the older one was smaller than the younger one. the younger one gets a crush on the older one i believe. if it helps, it was a shorter story tacked on the end of a different series. it had around 2 chapters, sorry if this is vague, but i hope you know it! feel free to ask questions ill respond with additional information if i know the answer.