It's actually adapted pretty well! But the novel describes J's thoughts more, like how he didn’t know whose heartbeat it was that was thumping loudly in this chapter, and how he saw 240's smiling eyes through the gas mask when he said "You really came out.", and how he thinks 240's hair was really soft when he patted him here,,,
Just a lot more thoughts from J, I recommend reading the novel because that guy thinks a lot lol

i am soooo excited for future chapters there’s so much shit i’ve been waiting to see adapted that is rapidly approaching