Seraph of the end 30

Yuichiro and Mikaela travel to the past to search for memories. A new door leads them to a shocking scene from before the birth of mankind! There they see an angel who looks just like Mikaela.... They also arrive at a huge city of angels. What do they witness?

Yuichiro and Mikaela travel to the past to search for memories. A new door leads them to a shocking scene from before the birth of mankind! There they see an angel who looks just like Mikaela.... They also arrive at a huge city of angels. What do they witness?