Tenshi wa Tansan Shika Nomanai

Love is always troubling. You want to have the courage to tell someone how you feel. You want to know who he likes. You want someone to listen to your worries. You want someone to give you a push. I know how you feel, and it hurts. Because I had a past I couldn't forget. And because now I have the "power" to save them.... That's why I, Io Akashi, became an angel. "I've finally found you, the angel of Kuze High." The angel touched the girl's cheek, in order to correct Yuzuki Minato's abnormal tendency to fall in love. This is a slightly mysterious coming-of-age story where memory and love play out softly.

(Source: Dengeki Bunko, translated)