Volume 2 of the YuuTopia Collection.
1. Musubiya Nanako
Nanako has her mother's ability to see the red strings that bind to people together in love. At her parents match making shrine, Nanako is forced to bring couples together by binding their strings. But who is she to be bound to?
2. Perfect Lovers
Mitsuharu and Kana get into a car accident just after breaking up. They wake up just to find themselves in a dimension where homosexuality is normal and heterosexual relationships are illegal.
3. Memoir Girl
Katakura Hitomi does not like her new step-mother taking up all the attention of her father. In an abandoned school building, she meets a high school boy who becomes her confidant.
4. Hang in There Nakago (Part II)
Continues the tale from Mint de Kiss Me. (Source: MangaUpdates)

Kabuki Takitsugu is a son from a family of the "Fragrance Way", who has the special ability to smell out human scents. A girl named Hatsune appears before Kabuki while he is making money on school grounds by matchmaking people. But for some reason he can't smell Hatsune's scent.

Takiko Okuda is a strong-willed girl living in the Taisho Era. She needs to be strong -- Oosugi, the one man she's ever loved, is a married man; her mother is terminally ill; and her father, Einosuke, has not been home in over a year. When at last Einosuke returns, it's with a notebook full of Chinese scribblings that seem more important to him than the death of his wife. Furious, Takiko steals away his completed translation -- "The Universe of the Four Gods" -- with the intention of tearing it to shreds, but the instant she opens it, she's surrounded by light... And it is said that this is how the legend of the Priestess of Genbu began.
(Source: ShoujoMagic)Included one-shot:
Volume 6: Ayashi no Ceres Gaiden

From Nyan-Nyan Rampage:

"The final arc of the story begins...

When Takao Osugi receives the mysterious "Universe of the Four Gods" book from his mentor, Einosuke Okuda, he does everything to keep it away from his young daughter, Suzuno. But when disaster strikes Tokyo, can he still protect her from her fate?

Shortly after the tragic finale of Genbu Kaiden, young Suzuno Osugi's tale as the Priestess of Byakko beings to unfold!"

Tanpopo Yamazaki is a girl with a dream of attending a high school in Tokyo. Yet when her dream comes true and the famous Meio High accepts her, all isn't what it seems. Students are sorted only by family connections and wealth, meaning friends are nowhere to be found. Taking matters into her own hands, she starts a gardening club. As the year progresses Tanpopo gains what she's wanted (maybe even more) and one by one, people weave into her life in a way that'll change her life forever...

Alice Seno seems like a normal girl in high school. She's a bit shy, she's got a crush on a boy named Kyou, and she's got an older sister who is more popular than she is...pretty normal stuff, until Alice has an encounter with a mysterious and magical rabbit girl that changes the course of her life, and Alice is introduced to the sublime power of the Lotis Words.

Asuka, who lived in Hokkaido with her mother, moves to Tokyo to look for her father she has never even met before. When she gets to his house, he is not there, only his children who claim they have never met their father either. Asuka decides to stay with her "brother" and "sister" while she looks for their father. Her two "siblings" are living alone and things sorta complicate when Asuka and her "brother" start to fall for each other...
(Source: MangaUpdates)

Yuu Watase's Masterpiece Collection Volume 5 consists of four stories.

1) Mint de Kiss Me -
There is a legend that if you kiss the man you like with a mint candy in your mouth, you can become one with your love. Misono is a rather superstitious girl who decides to test this out on Tohno-sensei, a young teacher she has a crush on. Unfortunately for her, she makes a mistake in the attempt to surprise him and instead kisses her fellow classmate Shindou. Of course this would be the time for the legend to work quite literally as Misono’s spirit enters Shindou’s body.

2) Genseika -
Chiya goes to school with her friends and witnesses one of them die suddenly as a flower bursts out of him. The three friends had been together since elementary school, the death hitting Chiya and Yutaka hard. When other people begin dying from the flowers, they investigate possible reasons for such usual deaths. To her surprise, she finds answers close to home.

3) Furimuke Romance! -
The hero of girls targeted by guys peeking into the locker room, Taka has quite the violent tomboy reputation. But all she wants is for some handsome guy to ask her out. A cheerful street vender, Ryouta gives her a special ring with a heart locket pendent to hold pictures. When two photos are enclosed, romance is in the air.

4) Hang in there Nakago (Part I) -
Involves the scenario where Fushigi Yuugi was actually done by real actors. Unfortunately, Nakago (stage name) is a lot more unconfident than the character he plays. At least his one main fan, an unnamed woman with flowers, is there to support him through his worries.

Itsuki Ringo (yes, her name means 'apple') is the top student of her freshman class with one talent: studying. Coerced by her mother into tutoring the abrasive upperclassman, Tsurugi Budou (who happens to be the brother of her crush, Tsurugi Minori), Ringo unwittingly finds herself butting heads with the rebellious Budou more often than getting any actual tutoring done. In an attempt to find out why Budou hates studying so much and skips tutoring, Ringo spies on him. She discovers a whole other facet to Budou's harsh character, and soon finds herself falling for him.

Rejected by way too many good-looking (and unattainable) guys, Riiko Izawa goes online and signs up for a free trial of a mysterious Nightly Lover "figure." The very next day a cute naked guy is delivered to her door, and he wants to be her boyfriend!
Has Riiko died and gone to heaven? The cute guy turns out to be sweet, smart, a great cook, and lots more. And, better yet, he looks like a million bucks, which is what he's going to cost Riiko if she doesn't return him in time! Will she? Or will Night be taken back to the company and made into scrap metal?