Protect the girl who is destined to die an untimely death. That is the mission given to me and "Senpai" from the heavenly realm. I can't believe that our job is to come down to earth and protect stupid human beings... and an ordinary girl at that? Why do we, beautiful angels, have to do such a thing! "Senpai" must have been thinking that way all along. That's what I believed, so why...

(Source: Kadokawa, translated)