ENG DUB * ENGAGE KISS VOL.1-13 END

STORY :

Bayron City, a pioneering metropolis built on a newly discovered energy source, promises every citizen a luxurious and comfortable lifestyle. In reality, young demon exterminator Shuu Ogata's life is far from extravagant. Despite running a private military business, he often struggles to make ends meet due to reckless expenses. Fortunately, Kisara, his demon partner, is more than eager to help Shuu with household matters—albeit a little too forcefully for his comfort.
The two work side by side, taking countermeasures against demon hazards, which stand as the biggest threats to the city. With danger lurking in the shadows, Shuu and Kisara strive to grant the town's safety; however, exterminating the possessed comes with a price unbeknownst to others.
“貝隆市”——不屬於任何國家，漂浮在太平洋上的巨型浮島型城市。因其開採新能源資源“歐爾貢礦”而在這個世界上佔有一席之地，貝隆市也經常發生被稱為“D災害”的由“惡魔”引起的特殊事件。
只有一小部分人知道D災害的存在，對其進行處理的是“PMC”（民間軍事公司），生活在貝隆市的青年修則經營着一家，但公司的規模很小，而且修還要找工作，所以資金週轉總是很困難。
公私不分地、獻身地支撐着修的生活的，是在貝隆市的學校上學的美少女高中生木更。還有一個，是修曾經所屬的大型PMC的職員，也是他的前女友綾乃，她現在依然很關心修，對木更沒有好感。
木更對修有着強烈的執着，其根本在於兩人的“契約”。
她的真面目是惡魔。
木更支撐着修的生活，也根據契約協助消滅惡魔。
其代價是甜蜜而危險的“吻”。愛與契約，兩人危險的羈絆。命運將會走向何方……