Listen to Sirji Aapko Kasam online. Sirji Aapko Kasam is a Maithili language song and is sung by Sushil Diwana and Sunil Diwana. Sirji Aapko Kasam, from the album Behkal Kaniya, was released in the year 2003. The duration of the song is 5:57. Download Maithili songs online from JioSaavn.