The story begins with Keita Suminoe, a male third-year junior-high school student studying for his high school entrance exams. He is living in a home with his older twin stepsisters, Ako and Riko, who share no blood relation to him, and they help him prepare for his exams. Even though he initially dislikes himself for it, he begins to become attracted to his two step-sisters, and his two parents encourage him to eventually get married to one of them.
Rating: 8.10/10 (avg out of 20 votes)
SIS Airs: Monday
SIS Status: Ended
SIS - General Information
Series Premiere: April 05, 2010 Classification: Animation Genre: Comedy Network: AT-X Airs: Monday at 11:30 pm Runtime: 24 Minutes
SIS - Season 1 -- 12 Episodes
1x1 -- Apr 05, 2010 -- Wonderful Days 1x2 -- Apr 12, 2010 -- A Lesson for Two 1x3 -- Apr 19, 2010 -- Alluring Sweets 1x4 -- Apr 26, 2010 -- Qualifications of a Lover 1x5 -- May 03, 2010 -- I'm Sorry! 1x6 -- May 10, 2010 -- Uneasiness at Akihabara 1x7 -- May 17, 2010 -- Wh-What!? A Dripping Wet Midsummer Delusion 1x8 -- May 24, 2010 -- It's Always That in August 1x9 -- May 31, 2010 -- Turning to God Only in Times of Suffering 1x10 -- Jun 07, 2010 -- At Last, the Real Thing! 1x11 -- Jun 14, 2010 -- Nitpicking a Good Day! 1x12 -- Jun 21, 2010 -- One, Two, Threesome!