Manga title please thank you!

A yaoi manga and mc is a delinquent or gang member i think who loves action movies. There is this one movie he really loves where the character sacrifices his life for his ‘aniki’ and mc thought it was a noble sacrifice (other people or gang members i think knows that it was because the character loved the aniki). It was only after doing stuff with ml he realized that it wasn’t because of ‘loyalty’ but because the character loves the aniki. There was a line that mc says “(character name) you traitor”. Thank you!