Sumeijhaleene (pronounced suh - may - xia - leene ) is a girl with a dark history. She comes from a place brimming with all types of horrendous monsters. No. Monster isn't a good enough word to describe how terrible these beings are. Despite this, she escaped this place with the help her parents and is now living a normal life. You'd expect her to be traumatized, but she lives a normal life. The only problem is... there's a certain monster that has become really close to Sume in all the years she's been trapped. She wants her back... and she'll stop at no cost to get what she wants... even if that means pure massacre. Sume finds out about this demon and is trying to avoid herself and everyone around her from being killed. She works up the courage to tell her friends and they venture off towards this monstrous island. The demon learns of their existence and starts to terrorize them. To make matters worse, it seems that this island is its own separate world. Will they ever escape?