I was gonna say that the difference between the Fertilante and Jiyong is that Seong-gu is just a psychopath, whereas Jiyong at least tries to put his murders to good use by getting clues to hunt the masterminds (even though the first season showed us how questionable that approach is). But now Seong-gu is also trying to play detective. While he is still more of a cold-blooded murderer than Jiyong (who's hot-blooded), they're a tad closer with this chapter. Also, did Seong-gu spare the pop-up realtor this time?