Re:ZERO -Starting Life in Another World- Ex, Vol. 4 (light novel)

Amid the upheaval after the royal line of Lugunica was broken, the Knightsof the Royal Guard are sent to protect an envoy to Volakia, a violent empireoften in conflict with the kingdom. Julius, Ferris, and Reinhard are part ofthis mission, but what will they find there...?