Military bl? With no age gap or if there is one then the older one should be the uke

https://manhuahot.com/manga/my-little-poplar/

Romantic Captain Darling.
Older uke captain x Young seme junior.
Super green flag. Even seme family love uke a lot

Over run. But seme is older here , it's soooo good tho. You won't regret it