Libels party or usually called liberty is one of the annual event held by SMAN 15 Surabaya. Liberty 2019 was held in Jatim Expo on 15th November 2019 with theme "Aetherealm". Liberty invites some guest star namely Reality Club, Kahitna, and Didi Kempot with various genres that can be attended by all circles from teenagers to old.

This event is open to the public. Everyone who have liberty tickets can enjoy the event. Beside the performances from the guest star, there were food festival and friday market. The food festival provided some foods and beverages such as McD, Yoshinoya, and Pesen Kopi. For the friday market they provided clothes and any other stuff.

This event is proudly succesful this year, the committee did a great job with the guest star. They can choose a guest star that can make us all unite and i personally hope that this good work can be maintained or even increased next time.