Everybody has a protection spirit. Their behavior has a direct influence on the person they protect. For instance, if protection spirit A falls in love with protection spirit B, then host of A will fall for host of B (synchronized effect).

Karin has Hiriji as a protection spirit and that's why he doesn't have friends. It all changes when Karin has a little incident and gets help from his sensei (teacher), Takatsugu, who's protection spirit is Nagi. Sensei is the school nurse and can see, hear, and touch protection spirits and (the same as Nagi) was a playboy 'till he meet Karin (Hiriji).

Little Rice-chan (guy the size of a bug) has fallen in love with a human boy who adores him and moved into his familiy's home, which is strange enough especially for the family that has to look on! Then all of Rice-chan's other suitors and associates show up! For some reason EVERYONE loves this little guy!
(from B-U)

1-4. King Game
The second prince, Renge, of our favorite royal family is sent to a neighboring country as collateral in a foreign relations deal. When things turn sour between their countries, he becomes a virtual hostage of a tyrant King, Ouga.

5. King Game: Sixth Prince vs. Third Prince
Homura, third prince, fell in love in his brother, sixth prince, Airi, when they were kids. Younger prince was very sickly at that time and his brother started to learn medicine (with poor results) in order to heal him. Now they are grown up, they are lovers (by name only) and Airi is bigger and no longer sick or weak, but not in Homura eyes. Sixth prince decided to change that.

6. Kaizoku Game: Pirate vs. Fifth Prince
Fifth prince Yuuri tried escape from castle and ended on pirate ship that belonged to Kuuron. From this point young prince starts living on ship and being the captain's "woman".

Story about a girl who has a problem -- she thinks all men are devils, and she just happens to be engaged to THREE of them. There's a curse haunting the boys who pursue her that transforms ordinary lust into a nearly-demonic violence that has her bolting in the other direction at just at the sight of them. But there's a reason they want her so badly...and why she, too, finds herself torn between their sinfully sexy bods and her ideal man: a pure, innocent, angelic ten year old boy. Devils, Angels, Hormones. What more do you need? ;-)

Chisato is a beautiful 35 year old writer (who looks like he's really 18), and father of Riju, a cute 15 year old boy. Chisato's hobby is to drive away all of Riju's friends because he thinks they want to corrupt his precious child. So he shows his good side to these boys while he poisons the cake he brings them with a smile. However, there is one guy, Shunsuke, who doesn't fall for the tricks. But is Shunsuke really aiming for Riju? Who is that mysterious writer Chisato loves so much? And why is Chisato convinced that Riju's friends want to take advantage of him?
(Source: MU)
The story "Kireani" was published in the third volume.

Handsome, tall, and charming bachelor Fin Deitory that every woman wanted just made the most regretfully and stupidest mistake of his life. It also changed his whole career which he imagined to be an awesome agent in the SDF, abbreviated for Special Dispatch Force. On the day he was supposed to be starting his job though, he enters the wrong room mistaking the plate name sign to be "SDF: Special Dispatch Force" but instead, it was "SDF: Special Doll Force". He learns that the group was a secret to the real SDF and was only consists of doll collectors. But the handsome people trap him there because he was also handsome making him also a doll collector. Being a little bit conceited and such, Fin can't think of himself as a doll collector but he later realizes the importance of it.....

Hiyori, named "the flower of high peak" -because of his beauty- has lived a dull social life and has never been in a relationship. The only confession he ever got was 5 years ago in high school..and that too by an ikemen! (Not knowing how to react, he ran away after giving an utterly ambiguous reply)

Years later, now that he's fed up of his social life...he prays to the God at the sanctuary to let him meet with his destined one......and just who might this destined one be?? (.....surely not the ikemen from high school right?)

Things get hot pretty fast.

Three years after being separated from his brother, ?ya can finally come back to work with him in the coffee shop "La Maison". It was in this place he adores that in the past he exchanged his first kiss with Haruka, the chef decorator of the coffee shop he had never seen again after. Still soothed by this memory, he only yearn to meet him again.