Sachi-roku: Sachi no Mokushiroku

"Humanity's Judgment"—a process by which an angel and a demon meticulously pass judgment upon a human, and the final score determines the fate of mankind. But this time, the chosen subject is the incredibly mischievous 6-year-old elementary school student, Sachi Ueno?! Just how will the unconventional living arrangement of an angel, a demon, and a human shape the future of humanity?

(Source: MANGA Plus)