Cid Kagenou is a high school boy who became the king of darkness but he became Chunnibyou but he was hit by a truck which made Cid move dimensions to Isekai and when he became Cid Kagenou in front of people he acted like an NPC only but he had another side to him. at night, namely shadow, namely the chunnibyou side of cid who has great strength and is an expert swordsman and also cid has an organization which he calls shadow garden and cid's goal is to become the king of darkness and very rich. 