Angel's 3Piece!

Angel's 3Piece! (天使の3P!, Tenshi no 3P!) is a Japanese light novel series written by Sagu Aoyama and illustrated by Tinkle. Two manga adaptations have been produced published by ASCII Media Works. An anime television series adaptation by Project No.9 premiered on July 2017.

Plot
Kyō Nukui is a reclusive high school student spending his days composing songs and uploading them online. One day, he is approached by a trio of orphaned little girls who ask for his help to hold a performance at the church where they live. Intrigued by their request and impressed with their skills, Kyō decides to help them.