Wait... UR RIGHT OMG. I just realized that their half brothers. So he fell in love with his brother... This changes everything. (︶︿︶)＝凸
Ayase and Licht arent half brother. Where does it say that they are half brothers? Daddy long legs is not his real father. I dont understand this.
Daddy long legs are their uncle, Abel is their father. They're still half-brothers, since their mother are two different people.
Abel fucked another woman and Ayase was born. Then he fucked Mary and Lich and Kain were born. It does say in the story that Abel left a japanese girl pregnant
1.) The most obvious, Kain has a high probability of being in love (romantically) with Licht, who is his twin brother. (This doesn't end well.)
2.) Abel (Kain and Licht's father) most probably also loves (romantically) his brother, Reihard-sensei. (This doesn't end well either.)
3.) Reihard-sensei was part of Ayase's harem for quite some time. Reihard-sensei is Ayase's uncle by the way. (Confirmed to just be fatherly love.)
4.) Mary (the girl Reihard loved but fell in love with Abel) most likely had an incestuous relationship with her son, Kain, because she thinks it's Abel. (This also doesn't end well, 'cause she dies.)
5.) Lastly, Ayase and Licht seems to be like a "couple" now ('cause this is shounen-ai people) and they are half-brothers. (This is what I kinda hope ends wells, wait, it's already THE END.)