From Esthétique:

Sakura had lived with her grandma ever since her parents died in a car accident when she was three. When she turned fourteen, her grandma also passed away, leaving her alone. Just when she was about to give up hope having a family, out of nowhere, four guys claim to be her older half-brothers.

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- Himitsu no Tobira no Kugurikata (Vol. 4)
Terasima Tika has always wished to meet her prince charming. When she accidentally enters the 'Spirit Door' and is placed in the body of her brother, she is forced to be him for the day and go to an all boy's school where she hopes to finally meet her prince.

1-3. Hitai ni Mikazuki
Ten years ago, Yutaka followed Azusa but ended up falling from a tree. Because of that, she has a moon shaped scar on her forehead. Then the two separated, but when he came back, he was a shinobi! (From ShoujoLove)

4. Gakuen Nanafushigi-kun (学園七不思議くん)

5. Kirakira Ichibanboshi (キラキラ一番星)

From Which Scanlations:

One day, Kengo Yagami found some of his classmates teasing a turtle that lived behind their school--and he beat them up. But when the turtle spoke, he was so shocked that he kicked it as hard as he could. Unfortunately, the turtle was actually a god, and as punishment, he switched Kengo's body with his childhood friend Mitsuka's, and their new bodies are causing both of them a lot of trouble at school...

Also includes the one-shots "Kirakira Hoshi no Ana" and "Kimi wa boku no Saboten."

Okubo Souka hates girls but what happens when he's paired up with the quiet Magura for class duty?

After their parents are killed in a plane crash, Ryuuichi and his younger brother Kotarou are taken in by the chairman, who they never met before, of an elite academy. Ryuuichi becomes the school daycare's new babysitter.