泥の分際で私だけの大切を奪おうだなんて

"Protect that girl from an untimely death." That is the mission given to me and my senpai by the heavenly realm. What kind of a job is it...... to come to Earth to protect some stupid human? She's just an ordinary girl......? Why do we, heavenly angels, have to do such a thing! Senpai must have been thinking that way, too, or so I thought—? (Source: MF Bunko J, translated)