Hekikai no AiON Manga Lot Volumes 1-3

Hekikai no AiON manga lot volumes 1, 2, 3, written and illustrated by Yuna Kagesaki. In used condition. Summary: Weeks after both his parents died in an accident, Tsugawa Tatsuya's still mourning and thinking about his father's last words, "Tsugawa family's man must be a man of great vessel". But Tatsuya is not confident he can fulfill his father's last wish. Then he meets Miyazaki Seine, a strange girl who seems to enjoy being bullied. Tatsuya thinks he can help her, even if his friends only see her as a masochist pervert, and Seine herself told him to mind his own business. Seine hunts creatures of the sea, a parasitic bug that controls humans and makes them to do hateful things. She has an immortal body and a beast called AiON that lures and devours the bugs from inside the human host. She and the bugs naturally have an impulse to kill each other on contact. Even so, Tatsuya still can't just leave her alone, he wants to help her.