Engage Kiss (Original Japanese Version)

Shu is always in trouble with money but manages to live thanks to the support given by his ex-girlfriend Ayano and the ever-devoted Kisara.

Kisara is in a great mood after getting a key to Shu's apartment. On the other hand, Shu can't find any peace of mind when she gets ahold of the company's financial situation and increasingly encroaches on his life by pretending to be his mistress.

A large-scale power outage hits the heart of Bayron City's Downtown. It was a D Hazard caused by a giant caterpillar-shaped Demonically Possessed.

Although the Demon Possession that caused the large-scale power outage was exterminated, the problem remains unresolved as the power shortage in Bayron City continues. Meanwhile, Kisara witnesses a secret meeting between Ayano and a mysterious man.

Ayano has become a target for Demon Possession. Although Ayano narrowly escapes her first attack with Kisara's help, she begins a life of isolation to hide her Demonically Possessed eyes. Meanwhile, Shu is offered a chance to work together with Mikami.

Kisara keeps her distance from Shu's apartment since she saw the memories of Shu and Ayano's time in the warehouse.

The Anti-Demon Bureau faces a growing sense of danger with the emergence of a new power that could shake the framework of their organization.

Thanks to Shu and Kisara's efforts, the Anti-Demon Bureau successfully detained Sharon, and peace returned anew to Bayron City.

The evidence gathered points to the real Demon Agent. And it was Shu's most trusted person. As the Police Agency and top officials of AAA continue to strategize and negotiate, Shu confronts the true criminal alone.

The memories Kisara stole from the demon revealed the truth behind the attack on Shu and his family 12 years ago.

In the middle of the battle against the demons on the artificial island, Kisara was stabbed by a spear before Shu's eyes. Saved by Ayano and Sharon, Shu helplessly evacuates from the fight when he sees the person he's been looking for.

Shu and Kisara's relationship restarts on a clean slate. This time, Shu decides to protect Kisara after sensing her feelings. S-Class demon Kanna's massive attack approaches Bayron City.

In the chaotic mix of humans and demons, Shu and Kanna meet in a violent clash as various motives intermingle in a battle engulfed by a sea of flames. Ayano, Sharon and Kisara try to intervene in the fight that puts the fate of the world at stake.