2nd: doesn't the looks of MC fit the description of the people getting murdered?
3rd: everything started 4 months ago....
So... maybe someone knows that prince had spent a night with a black-haired person... and tries to eliminate the possibility of an heir? Or a jealous lover?
Putting the eccentricity of the prince aside, everyone in this chapter is beautiful. Their body is perfectly proportioned. Especially our ML haha. Just beautiful. That makes me afraid why the serial killer targets the exact type of men like him & it also started four months ago, when he had an affair with an aristocrat.
The serial killer seems to target people that MC meets the criteria for, which seems to be setting up for an arc later where MC gets kidnapped and the prince has to go and rescue him.