Lunar Legend Tsukihime

Shiki Tohno suffered a near-fatal injury as a child, which led to him being sent away from the Tohno family and raised by relatives. Years later, as a high school student, he is called back home after the death of his father. His sister Akiha, now the head of the household, insists he return. But Shiki carries a strange secret-ever since the accident, he sees mysterious lines on everything around him, and only a special pair of glasses can block the disturbing vision. His memories before the injury are also hazy. On the day he moves back, he encounters a woman named Arcueid Brunestud and, in a sudden bout of madness, kills her with a single stab. When she reappears unharmed and asks him to be her bodyguard, Shiki is drawn into a journey to uncover the truth behind his forgotten past.