Aion Graphic Novel Volume 01 (Of 5) (Mature)

"Tatsuya Tsugawa loses his wealthy parents in the middle of high school. Trying to fulfill his father's dying wish of his becoming an upstanding man, Tatsuya attempts to save a gril from obsessive bullies only to be consumed with intrigue and slight obsession himself. But what will Tatsuya do when his good will and earnest efforts lead him into a twisted fantasy world infested with mermaids and mind-controlling parasites?"