Responses
very bromance http://www.mangago.zone/read-manga/silver_diamond/
not shounen ai but the bromance is strong and the story is amazing http://www.mangago.zone/read-manga/nanohana_boys/
Prince bari
Bloody Mary( SAMAMIYA Akaza)
Vampire Library
I-ren
Hakkenden (Lots of Bromance, u should watch the anime adaptation too)
SOMEONE GIVE ME BROMANCE SHONEN AI PLSSSSSSSSSSSSSSSS