Kiss×sis OAD / Season 1 Season guide Kiss×sis OAD: Season 1 12 episodes Premiered Dec 22, 2008 Updated Jul 23, 2026 Spoiler-safe Advertisement Episodes S1·E1 Episode 1 Dec 22, 2008 · 24 min S1·E2 Episode 2 May 22, 2009 · 23 min S1·E3 Episode 3 Nov 20, 2009 · 23 min S1·E4 Episode 4 Jun 4, 2010 · 23 min S1·E5 Episode 5 Nov 22, 2010 · 23 min S1·E6 Episode 6 Jun 20, 2011 · 26 min S1·E7 Episode 7 Nov 30, 2011 · 24 min S1·E8 Episode 8 Jul 6, 2012 · 25 min S1·E9 Episode 9 Feb 6, 2013 · 22 min S1·E10 Episode 10 Nov 6, 2013 · 23 min S1·E11 Episode 11 Aug 6, 2014 · 24 min S1·E12 Episode 12 Apr 6, 2015 · 23 min