Spending your everyday life working as a part timer at a cafe, wake up one day with a strange dream. And you see a suspicious mark on your neck? “It’s the devil’s mark…” You’re about to lose your body to the devils! And you find out that there are ‘Angels’ and ‘Devils’ living right next to you? You need to look for the devils to save your life, Is it a crisis or a romance that’s slowly approaching you?