Set about two years before the events in Les Mille Fleurs, it follows the story of Chika’s brother, Shin, a talented artist in the 12th grade, and Ayana, a clumsy high-school freshman.

From Esthétique:

The story is basically about a girl (16) and a boy (18) who gets married because the girl is believed to have a terminal illness. The boy swears to look after her. The story revolves around the hardships around being married when you are so young of age and in schooling.

Meet Toni and Mika---identical twins as different as day and night. Toni is a star athlete, outgoing, and popular. Mika is shy, quiet, and academic. Although they look like ordinary junior high school students, when they unite, these twins produce Miracle Powers. Telepathy, teleportation, and magic are all used to help these girls get through the day. Nobody knew about Toni and Mika's powers until a nosey classmate discovered their secret. Can the twins keep their powers a secret or will they be exposed to the world?

From Tokyopop:
For all 15 years of their lives, Ami and Noa have competed against each other for love with the same results: both fall for the same guy, inevitably scaring him away and leaving them boyfriend-less. But the vicious cycle is broken when the girls go to a party and each fall for two different guys! With potential love on the horizon, the sky couldn't be bluer...until Ami discovers that these two dudes are actually duds with ulterior motives. Determined to get revenge on these players, Ami vows to make her guy fall for her while she trys to protect an unsuspecting Noa!

A collection of two short love stories.

Yuu is an energetic girl who's trying her best to keep close to her boyfriend Roku, a student from another school and very busy with club activities. When he has to be away for winter's vacations, will her efforts still be enough ?

[From scanlator site]
Five years ago, Chika received flower seeds from a “mysterious” boy, who asked her to grow them until they bloom. Five years later, the flowers have not bloomed yet, but another boy has come in front of Chika, and claimed himself as the “mysterious” boy. Is he really the boy in Chika’s memory? And will Chika be able to grow the seeds?

From Shoujo Crusade:

Takeda Una's ultimate wish is to find a boyfriend with whom to spend a romantic Christmas. All her previous boyfriends were weirdos, so she is nervous about being able to find a normal one. Will she succeed in her quest?

*Also includes another story called Umi ga Kikoeru (I Heard the Ocean).