read my ted talk (BDSM 101) lol:
http://www.mangago.me/home/mangatopic/10462949/
If you want an SSC BDSM that is very close to realistic, read
http://www.mangago.me/read-manga/aporia/
While yes, BJ Alex has a slightly better portrayal of BDSM compared to other bl's, it falls behind Aporia A LOT.
Yes aftercare is VERY important. Allow me to quote Squibbles:
"Usually, having a BDSM session is pretty intense on both parties but especially the sub (especially if they experience total loss of control in the hands of their Dom). Because of that, many people tend to feel drained and even a little disoriented afterwards. There's a phenomenon called the "sub-drop" which refers to an intense feeling of guilt/anxiety after a BDSM session, not because they regret it but because the endorphins (aka chemical compounds in your brain that activate when you feel good) stop. Even if there's no sub-drop, most subs like a bit of aftercare to feel safe and reassured that their Dom is there for them and cares. So yes, it's a common thing and not offering/providing aftercare is generally considered very bad manners, even if it's just a singular session with a partner you won't see again."

So each bl story I have read and read the comments all said the consent are important. Yeah they are fking important. So how d9es people with bdsm give they consent n what about punishment play. Im sorry if I'm too direct. I just doing some research on this kind of topic. Feel free to answer(⌒▽⌒)