I'm 27. Been reading shounenai (classic, usually ends badly) BL (romance) & yaoi (pure smut) since I was 15. Bara is yaoi for men.
If you want to get REALLY technical, yaoi is strictly "fan characters" & June is "original characters," so yaoi only pertains to doujinshi & fanfiction. That's how it works in Japan anyway.
Most of them aren't as deep & dark as Zetsuai/Bronze (Two underaged boys who LOOK like they're in their mid 20s. Rape, stalking, fratricide, incest, bisexuality, blackmail, spousal abuse, family history of mental illness, etc.)
Then there's Kusatta Kyoushi no Houteishiki. (Fairly softcore but still yaoi. A very long story about a student who has a crush on one teacher & then falls for the teacher's brother. He starts off as a young uke & quickly matures into a seme, which amplifies the comedy).