Japanese title : 聖の顔も三度まで
Artist : shinori
The title is a play on the standard phrase 仏の顔も三度. Literally, it says "Even Buddha's face three times". The implied total phrase is "Even Buddha will get mad if you pat his face (i.e., annoy him) three times." One colloquial equivalent would be "This tries the patience of a saint".
Pixiv : Here