Tying the Knot with an Amagami Sister

Yuu Ayase, son of a late legendary actress, is overwhelmingly mediocre. When he’s invited to stay with his mother’s friend, Yuu is shocked to find out that he’ll be living with three prodigy sisters who possess both beauty and talent…and who rule his new school as the Three Emperors. Can Yuu manage to melt the sisters’ cold hearts and fulfill his mother’s last wish for him to build a happy family?

Two years ago, Junichi Tachibana had his heart broken by a girl who stood him up on a date on Christmas Eve. Now a second-year student in high school, Junichi is wary of love because of his past and dislikes celebrating Christmas. However this Christmas, his encounter with one of six girls from his school: Haruka Morishima, Kaoru Tanamachi, Sae Nakata, Ai Nanasaki, Rihoko Sakurai, or Tsukasa Ayatsuji will finally open up his heart to love again.

Is insanity hereditary? Shougo Mikadono's beginning to think so, because the terms of his late father's will seem crazy and following them may drive Shougo bonkers as well. Oh, it sounds simple at first: before Shougo can claim his VERY large inheritance, he just has to start attending a certain new school and find a nice girl to marry. It's a little unromantic, but perfectly do-able, right? After all, all the girls seem quite friendly, so all Shougo has to do is find one he has something in common with. EXCEPT, and here's the kicker, it turns out that Shougo has WAY too much in common with one of them, because she's actually his long lost sister! And he has no idea which one she is! Will Shougo meet and court his Miss Right without committing something very morally wrong? Can he find his future bride without slipping into the wrong set of genes? And if his little sister does reveal herself, just how much will be revealed and under what circumstances?

Mixed up with another family's child as a baby, high school student Umino Nagi is finally meeting his biological parents. On the day of their meeting, he happens to encounter Amano Erika, a high school student at a prestigious and wealthy girls school. At her request, he's half-forced into pretending to be her boyfriend so she can avoid marrying her fiance....However, not only were they the babies who had been mixed up, they're also engaged to each other! The loving parents of both families officially recognize their engagement, and the couple begins living together. Nagi is in love with his classmate Segawa Hiro, and Erika is determined to rebel against her father, so the couple agree not to get involved with each other. The mixed-up and chaotic romantic comedy starts now! Note: The final two episodes were broadcast together as a one hour special