help me find a story

- it's Shounen ai
- black and white manga
- character: I lowk don't remember which one is the MC I think it's the the older one. they're both are highschooler, I don't remember what mc do but he constantly dotes on the younger ml, who is short and tiny for his age. I think he's 2 grade younger. he always wore uniform 2 size bigger since he's gonna grow into it. the younger one also play baseball.

pls I can't find it. I want to see the little guy grow since they foreshadow him being bigger than the mc