I don't remember him doing CPR in the novel... Am I remembering wrong?

He does it in the novel too. He panics more, Also slaps him a couple of times trying to wake him up. But in the novel he doesn’t leave his side until a little breathing sound comes out of Taekjoo’s mouth. the tone is different in the manhwa, it’s more shallow. So far thru the entire thing, they didn’t portray what’s happening inside the characters especially Zhenya. :(