Go Ryokou wa Anoyo Made? Shinigami wa Ueno ni Iru(2018)

Go Ryokou wa Anoyo Made? Shinigami wa Ueno ni Iru

Kaede, a job-hunting student, drowns in a river while trying to save an elementary school student. When he wakes up, he finds himself in an unfamiliar place, meeting Kaeriki, who calls himself the Grim Reaper...!?

(Source: Shueisha, translated)