泥の分際で私だけの大切を奪おうだなんて

Synopsis

Protect the girl who is destined to die an untimely death. That is the mission given to me and my senpai from the heavenly realm. How is it a job... to come down to earth and protect stupid human beings? Moreover, protecting an ordinary girl...? Why do we, beautiful angels, have to do such a thing! Senpai must have been thinking that way all along. I believed that, but why that kind of--?