As it is, its not a romance, if this is the end, then its not a romance an it should not be tag as one this is insane, its very good story its just that it says that it is a romance and it is not, if there its nothing more story, only this chapters, then they are brothers! Not boyfriends or lovers, or in love.
If you are here bc you read "here u are" bc of the anime, hear me out, this its not a romance story. Its a very good story, you should read it, but not expecting romance
Shounen ai often categorised with bromance too. So it's more like that.