THE ANGST OMG AAAAHHHHHH
Incest: both brothers have brother complex for each other. Tho the uke (older) doesn't show it much. Seme (younger) raped uke when he was about to move. Ending has so much angst because uke pretended that nothing happened when seme asked, but then when uke is on the train, he actually wanted seme to hurry up and chase after him.
Bakadane, Shitteruyo.