In the futuristic Bayron City, a floating metropolis powered by a new energy source, not all is as it seems. The story follows Shu Ogata, a young man who runs a small, perpetually broke private military company. He hunts "D-Hazards," demonic incidents that plague the city, but his methods are unconventional.
Shu’s greatest weapon is Kisara, a powerful demon disguised as a high school student. Through a dangerous contract, a kiss "engages" her immense power, but the cost is steep: Shu's memories. This creates a complicated love triangle involving Shu, the memory-devouring Kisara, and his caring ex-girlfriend, Ayano. The series blends intense action with romantic comedy and drama. The original broadcast of Engage Kiss on Tokyo MX has ended, but sign up for a reminder just in case it returns.