Responses
Initially.. to infiltrate the unhrdo and find his bro from what I have remembered. tbh, I have never tried to reread this as a whole...
I like your initiative of rereading as a whole. one's perception of the manhwa/material really changes when read nonstop from start to finish. Tried it with Tied up in twins and a trace of wonder. The former is also not cohesive enough and had some plot holes and the later is really built in with some lacking elements but one can understand both mains in the story if read from start to finish

After reread, just realized the plot is all over the place and Taeui is pretty stupid too ( ̄へ ̄)
What's the goals of the story?