The Multiplying Heir of a Conglomerate

"Are you...me?" Azuma Yushin, the heir to the Azuma Group, began multiplying one day. With no apparent reason for his existence, Yushin gradually becomes exhausted by the ever-increasing number of "me"s. His company, his private life, and his brother Yuta, who was supposed to be dead, and the cursed Azuma family. Will Yushin be able to protect "us"?

Source: LINE Manga, Translated