Listen to Ar Koto Koto Aar online. Ar Koto Koto Aar is a Bengali language song and is sung by Shayan. Ar Koto Koto Aar, from the album Ekhanei Shukh Chilo Ekdin, was released in the year 2021. The duration of the song is 7:05. Download Bengali songs online from JioSaavn.