Which animation does this dynamic picture come from?

A Channel is a four-grid cartoon work with the theme of campus produced by cartoonist bb Kuroda. The story is about the relaxed and happy campus life of four high school girls. On campus, they spit on each other every day, fight with each other and care for each other. The sincere and warm friendship between them is the bond that keeps m-girls together. Such a warm cartoon was animated in 20 10 1 1, and presented to you in the form of new animation in 201/April.