Shiii dude, I really liked him. The author brought up him character a bit to make him more likeable (him liking mysteries), so I don't think he'll be killed off.
To be honest, him trowing Kyochi under the bus is the most reasonable thing to do, the fucker sliced his head open and said that he was gonna get him killed not matter what, but even so DAMN their bromance was just starting to blossom.
just binge read all of this today and i'm hooked! can't wait for the next chapter. thank you for your hard work.
the mask and coughing at the end was a nice touch lol