The story takes place in the Holy Night Academy. Amen (voiced by Ito Kanae) is a famous "thorn" on campus, because she not only looks fierce and sharp, but sometimes speaks very poisonously. However, this is not the real Amen. Amen is actually very timid and shy. She just uses a tough appearance as a disguise to turn it into a fortress that can protect herself. Finally one day, Amen could no longer tolerate the many misunderstandings and misunderstandings of others in her life. She decided to change. Amen prayed to the "guardian spirit" and hoped that her wish would come true. What Amen didn't expect was that the next day, there were three more guardian eggs on her bed. The guardian eggs contained three cute and kind "guardian sweethearts"-Xiaolan (voiced by Acheng Kana), Meiqi (voiced by Kato Nanae) and Xiaosi (Toyosaki Ai). With their help, can Amen reshape her image?