When the evils on earth and the angels in the sky get into a quarrel everything goes wrong. The three evils (Mina, Chaeyoung, and Tzuyu) and angels (Jeonghan, Seungcheol, and Joshua) are both sent on missions to wreak havoc but when one person from each team fall for each things escalate. 

This book is kinda bad and cliche but really random. Sorry for any typos,I type this in my phone.