Mobile Suit Gundam 00: In Those Days (機動戦士ガンダム00 ｉｎ ｔｈｏｓｅ ｄａｙｓ Kidousenshi Gandamu 00 (Daburuō) in those days?) is a compilation of Yun Kōga's short story mangas serialized in Newtype magazine between November 2008 to August 2010 issues. The stories are set between and after Mobile Suit Gundam 00's First and Second Seasons. The chapters were compiled and published by Kadokawa Shoten on August 26, 2010.