Alpha No Chouinshiki summary:

Oscar, an Alpha, was raised as the crown prince of Galguardand has grown to be both handsome and refined. For some reason, he isto conduct a signing ceremony alone with Prime Minister Legrand of theallied nation. The moment Oscar confronts Prime Minister Legrand, hisbody suddenly goes into "heat" simulating that of an Omega, eventhough he's supposed to be an Alpha. Could Prime Minister Legrandactually be the "Supreme Alpha" who is said to be the only one in ahundred years to cause even an Alpha to go into heat...? A love storybetween the handsome Prime Minister of the neighboring country and theCrown Prince of a nation.+