Series: Touhou - Sakuya-san and Miwady. Once Again! (Hoshino Madoka)

Japanese Title: 咲夜さんとおぜうちゃま。ふたたび！
Artist: Hoshino Madoka
Artist's pixiv: Here
The "Miwady" spelling is on purpose, as the original, "Ozeu-chama" is the equivalent affected lisp in Japanese.