Future world, mecha setting, upgrade flow. Gong is a demon clan, paranoid and possessive. Shou is a mixed human-male race, and because it's midnight, she has an estrus setting similar to ABO's. As a half-demon, he was naturally spurned by both sides. He lived with his human mother in a remote star field. Later, he awakened the demon bloodline and took away a human SS-level body. He hid his identity and entered the human secret realm to study...