Milo Nishina, 16 year old lonely kid living with his single mom, has his whole world turn upside down when he meets a girl his age named Pelagia one day. After seeing a group of guys acting like creeps to her in a dark alley, he tries to stand up for her - only to get beat up badly. Milo is then suddenly saved from them by that same girl - who turns out to be a strange octopus monster-human hybrid! A coming-of-age urban fantasy teen romance story.