Amagami Wa!

Based on the visual novel by Enterbrain with the same name.
A second-year high school boy finds himself uneasy during Christmas time due to an experience in the past. However, this year at Christmas, he gets his last chance to ask out a graduating female senior named Haruka Morishima or one of several other classmates. The story of the anime will be arranged in an omnibus format, with each heroine getting her own version of the story animated. Each heroine will sing her own version of the ending theme song.

Same plot as Amagami manga's but from diferent artist/authors.

Miya's brother Junichi has fallen in love with that natural queen Morishima Haruka. And with Junichi longing to date Haruka on the upcoming Christmas Eve, Miya, who has always cheered him on, is now...

Tachibana Junichi is a boy from class 2-A. One day walking home, he saw by accident a girl's "underwear." Afterward, he finds outs what it really was... 
Based on the Amagami love simulation game.  The focus is on Tachibana Junichi relationship with Ai Nanasaki. The second arc focuses on Morishima Haruka. The third arc focuses on Sakurai Rihoko.

Another Amagami serialization in Comp Ace magazine. This version features Sakurai Rihoko as the main heroine.

An "if" story with Hibiki Tsukahara as the main character.

Note: Includes 1 extra chapter.