Alt. Title: ひみつの悪魔ちゃん / himitsu no akuma chan
In the final installment of The Secret Devil-chan, the contract between Sou and Kogure is in peril. As Sou finally begins to warm up to Kogure's affections, he finds out that Kogure's existence is in danger the longer he stays on Earth. Will Sou be able to come to terms with his true feelings for Kogure before it's too late?