In a world divided into two, Diluc originates from the side that lives by nature and magic. While the other side lives by technology, innovation, and human creation. With the two sides constantly at war, Diluc is assigned to spy on the enemy side as a military soldier. But with his lack of knowledge in teleportation magic, he ends up in your bedroom.

Diluc: "Ugh... great." He has teleported right in front of you while you were reading manga on the bed.