Only because he wants it lol
MC is at the end of some freaky "bdsm" being "imposed" to it
But he actually likes and welcomes it all
So I would say it's safe because the mc and the ml are matching each other freaks
Mc transmigrated into a novel where he was kidnapped by his boss, who happens to be into bdsm and is in love with mc. But the boss doesn't realize that the MC is actually into bdsm unlike the original character, and so MC is fulfilling his dream of masochism while pretending to hate everything like the original in the novel. As far as safe to read, if you don't like bdsm probably not for you but so far nothing has been too crazy. :)
It is probably his kink? Like some sort of BDSM play
I read a few pages and i really need to ask why the mc is chained ? .. like what .. is this safe to read ?