Kamen Rider Kuuga: Dark Side (仮面ライダークウガ -DARK SIDE- Kamen Raidā Kūga: Dāku Saido) is the second S.I.C. Hero Saga story based on Kamen Rider Kuuga. It continues the expansion of the series mythology. Dark Side ran in a separate special issue titles Hobby Japan Mook S.I.C. Official Diorama Story S.I.C. Hero Saga vol.2.