Shinimono Gakari

Shortly after entering school, Shibao Masayuki is forced by his classmates to take on the role of "death officer." "What does it mean to be in charge of the deaths...!?" Shibao is confused, but Fujimi Sorako, who is also in charge, explains to him. "The death officer is in charge of taking care of ■■■." As he wanders the school building at night with Fujimi, he meets ■■ and their strange and mysterious duties as officers begin...

(Source: Kadokawa, translated)