Show: ONE OK ROCK at Ansan Valley Rock Festival 2015, Daebu Sea Breeze Theme Park, Ansan, South Korea

Ansan Valley Rock Festival is one of South Korea's premier summer music festivals, held at the Daebu Sea Breeze Theme Park in Ansan, Gyeonggi Province. Initially known as the Jisan Valley Rock Festival, it was rebranded when the event moved to Ansan in 2013. The festival is renowned for its diverse lineup, featuring both international and Korean artists across various genres, including rock, alternative, and electronic music.

On July 26, 2015, ONE OK ROCK delivered a dynamic performance at the Ansan Valley Rock Festival. Sharing the stage with prominent acts like Foo Fighters, Motörhead, and Twenty One Pilots, their appearance marked a significant moment in their international exposure.