RUMINATION is the tenth Korean mini-album of SF9. It was released on November 22, 2021 with "Trauma" serving as the title track. The album was released in four types: Scar, Blood, Connect and a KIT version.
This is the last Korean album to feature the complete line-up of the group due to the military enlistments and Ro Woon's departure from the group on September 18, 2023.
