I don't think I'm a fan of this. Sure it'll work sometimes, but we can't just decide "I'm going to bluff this hand!" which it seems like you've done, and against the wrong opponent too.
First question is, why are we raising preflop with a meh hand? Limping is fine, and we can even call a small raise because K2s is going to be ahead a lot of the time. Raising bloats the pot, you're out of position, and he'll call with ATC (correctly, I might add).
After the flop, OK with the Cbet. He might fold something like 33, 44, and maybe Ace-high if you're lucky. But against this opponent, probably not right?
Turn: He's not folding any pair that he called on the flop with, right? 7 is not a good barrel card.
River: I guess let's just continue the bluff, we got this far. I don't think he's folding a pair, given your description. Your line looks mad polarized and super suspicious. What're you representing, QQ+?
Tl;dr Pick better spots for bluffing. This can get through, but we need to bluff when we think it will get through (or at least has a high probability of doing so).