Blood Sucker: Legend of Zipangu

From Yes_Rhade: Kaname and Tooru have been lovers for three years, but Kaname just can't accept their love. Why? Kaname is Tooru's uncle, and no matter how much Kaname loves Tooru, he realizes that their relationship is wrong and should not continue.

After years, Suk-O is thrilled to run into his high school crush, Suh-hee, but is shocked to find out that she is the mother of a newborn son. Unable to let her go, he finds himself in a budding relationship with Suh-hee and her child while another man from their past comes back into the picture. Original Webcomic http://webtoon.daum.net/webtoon/view/foolforyou#8 

Every 30 years, a new princess is chosen from the Hime family to serve the Hayagami. The time has come again, but over these past years, records state not a single female has been born, save for one, the 15 year old Arata. The only problem is, Arata is actually a male! Forced to disguise himself and take the place of the princess candidate until a formal one can be…

[From Storm in Heaven]: Possessing extraordinary detective skills and even helping out at the police department can't be normal, and anyone who knows Uryuu Nanao knows that she's different from the rest. It is this distinctiveness that draws both Karasuma Nozomi and Sakuragawa Nozomi to her despite Nanao's attempts to distance herself from them both. However, a series of murders take place and Nanao is forced to enlist their help…