I don't know, i think the little brother and the other debt collectors definitely could've been cut out since…
Have to agree with you, even the their (boxing couple) characters have solid backgrounds which the main CP does not have. This made the series really fell flat at the end.
As for the potassium Cl, the nurse administer it directly thru the IV line, the reaction is like irl.
Tol getting angry when Tin says he "didn't mean to kiss" him.... O.o
:)