the shorter ones the oldwr brother and the taller ones the younger brother. BUT THE SECOND TO LAST CHAPTER WHEN THWY SWITCHED BIG BROTHER AND YOUNGER BROTHER ROLES WASNSOOO CUTE (´°̥̥̥̥̥̥̥̥ω°̥̥̥̥̥̥̥̥｀) (honestly dk whag i rate it tho cus i didnt like it for the storyline w the customer that turns out to be the swim coach. literally skipped it)
Onii-chan Datte Amaetai Wake de