A friend of FME has shared with me a manga that might be of interest to anyone interested in consanguinamory, which is a popular theme in manga. If you are interested, keep reading...
The manga is called "True Love" by Sugiyama Miwako.
"Once upon a time, there was a loving older brother (Yuzuru) and a loving younger sister (Ai), who were best friends and completely inseparable... that is until their parents argue to the point of divorce. The dad takes Yuzuru with him overseas, leaving the traumatized Ai with the mother in Japan. As years went by, the two characters eventually move on with their lives, learn to look out for themselves and do well in school, but they still miss each other terribly.
Nine years have passed and Yuzuru misses Ai so much that he convinces his father that he wants to go to school back in Japan. Yuzuru and Ai later meet each other again and, for the first 5 chapters, make up for lost time. They talk, they text, they support each other during tough times, just like good friends. The situation gets even better, when the mother and the father and the mother decide to get back together again.
Everyone is reunited and everyone is happy...that is until the end of chapter 5, when Ai and Yuzuru accidentally do something that shows they have incestuous feelings for each other. They treat it like an accident that meant nothing and move on. Still, both siblings secretly admit they have romantic feelings for their sibling and try painfully hard to hold them back. Things get even worse, when Ai's new friend tells Ai that she is in love with Yuzuru and when Yuzuru's super hot friend wants to ask Ai out."
That's the story so far.
Other info: The manga can be viewed for free at www.MangaHere.com.