“けいおん10年、あずまんが大王20年…時間の流れが速すぎて、わけがわからないよ！！ちよちゃんと、ちよ父。冬服の色で塗っちゃった…(・ω<) てへぺろ”

Means something along the lines of: “K-ON is 10 years old, Azumanga Daioh is 10 years old. Time goes so fast, I don’t understand! Chiyo and Chiyo-chichi. In winter outfit colours.”

src: https://twitter.com/hiyopuco/status/1115914765849829376