Because of her appearance and her behavior, Yoi has been continuously treated as a prince, despite being a girl. One day, when she already accepted being put into the role as a prince in high school, she somehow got entangled with one of her senpais at school, someone who's also being called "prince"?

From Damn Feels!:

Chidori only eats soy sauce ice cream from the Purple Valley shop because “It tastes the best!” she claims; no other place has the same flavor. While she’s there one day she encounters the person who made Purple Valley’s ice cream special. To her surprise, he has changed in a way that no longer resembles the boy from her memories…

A collection of extras from creators in Shueisha's Margaret and Ribon shōjo manga magazines to raise funds for the victims of the Great Eastern Japan Earthquake disaster.

Heroine Shikkaku + Hirunaka no Ryuusei crossover (boys version)

Heroine Shikkaku + Hirunaka no Ryuusei crossover for Betsuma/Margaret 50th Anniversary (girls version)SPOILER ALERT FOR HEROINE SHIKKAKU END

From Damn Feels!:

Chidori only eats soy sauce ice cream from the Purple Valley shop because “It tastes the best!” she claims; no other place has the same flavor. While she’s there one day she encounters the person who made Purple Valley’s ice cream special. To her surprise, he has changed in a way that no longer resembles the boy from her memories…

Hibi Chouchou and Hirunaka no Ryuusei crossover bundled with Margaret 2014 #11 as separate-volume supplement.

Hirunaka no Chouchou: Shopping Biyori no Shinhakken (A Shocking Day for New Discoveries)
A shopping mall date with Suiren and Kawasumi. But... Suiren gets lost?! She and a small girl find themselves at the Lost Child centre where suddenly Suzume and Mamura come along!

Hibi Ryuusei: Suzume no Parallel Koukou Nikki (Suzume’s Parallel School Diary)
The Suzume who steals everybody’s attention at the high school entrance ceremony. Though she's no great beauty, she does things at her own pace and is a hot topic amongst everyone. In the middle of this, the only person who doesn’t notice her, Kawasumi – will he become interested?!

The fresh middle school days of two young boys who weren't yet friends: a distant summer's faint memory. Yuudai is an ordinary 14-year-old boy attending middle school with his friends. One day, a shocking secret is revealed about one of his classmates, Harada, which propels him to the center of the rumor mill and the cruel gossip that follows him around. But Yuudai is not as shallow as his classmates and he's clearly bothered by everyone's attitude towards Harada. How can he make everything go back the way they were, if it's even possible?

A collection of short stories that revolve around a chain of people.

15-year-old country girl, Suzume Yosano, has to move to Tokyo to live with her uncle due to her father's transfer. She bumps into a mysterious man who ends up taking her to her uncle's place after she gets lost. Turns out, Suzume will be seeing him a lot more often once she starts school because... he's her homeroom teacher!?

Included in the manga is a oneshot story called Tsuyu Kaoru (A Love Story in Moist Rainy Days) in volume six:
A romantic and melancholic love story behind a red umbrella.

Ohno Fumi is a poor 2nd year high school student. Because of her father's debts, she's kicked out of her own home and has to rely on her own connections to survive. Thus begins her life as a live-in housekeeper for a reclusive writer.