Responses
the abbreviation is blk instead of bl
I said that because in the manga it's abbreviated as BL a few times
As on this page: http://www.mangago.zone/read-manga/bluelock/hs/mpn_chapter-2104689/pg-5/
Wow I really love this manga
It's so funny that the abbreviation for bluelock is BL
that moment you try to leave yaoi but yaoi doesn't leave you ╮(￣▽￣)╭