Silent Siren brings a double CD with 31 tracks selected from their previous works, ranging from the debut single "Sweet Pop!" through the 11th one "alarm" as well as the 1st album through the 4th one. This edition includes a bonus DVD with 23 music videos, including ones for "Yumeoi," "Routine," "Joshiko Senso," "Te wo Tsunaide," and "Yoshida-san."