The story centered on the perspective of the boy named truth in a dark fantasy world of mana he progresses not with powers or conquest but with wisdom and love as he ventures upon the war ridden world to reach his goals.
but really i could never imagine loving a relative in an intimate way ..but sure thing it did happen in real life w/ my mom's neighbor in her hometown..a brother & sister really did fall in love & even have a child but of course their relationship ended or probably forced by their family to end it