In the last chapter Juheon had a flashback of a prior break in amd the intruder was a batt...

In the prior chapter, recall that Dohu had joked about breaking into the ML's place. Essentially when Juheon went home and saw the mess, in his panic, he likely superimposed Dohu's words onto what happened. But i am quite sure that Juheon never actually believed it was Dohu because they were both together at the meeting prior to this so it wouldve been impossible for Dohu to have done it.

This scene likely shows that Juheon still has some major trust issues, particularly towards Dohu, because his brain automatically thinks of Dohu as a potential threat even when he logically knows it wasn't possible.