Predict a Korean War of Reunification scenario

[True Federalist (진정한 연방 주의자)]

I can see Kim Jong Un unleashing a Pyrrhic response to a real or imagined attempt to remove from power, be it an internal or external attempt.  If so, he'd likely call it a Reunification War, but I don't see Kim Jong Un being so delusional as to think North Korea could win a Reunification War and thus he won't start one out of the blue with the intention of reunifying the peninsula under his rule.

[True Federalist (진정한 연방 주의자)]

If we're going for unrealistic, perhaps Kim Jong Un attacks to the north to repatriate Yanbian from Chinese control.