Where is that Witch like lady? Sarah's story

Sarah is a 18 year old girl completed her high school with good grades and wanted to join a university in a different place called Borsia. She lost her parents when she was young. She lived with her granny. She will experience a spirit in the house which she first approached to stay. She develop many questions in her mind. In between there is a love developing between her and Lan, her classmate. The house was filled with many horror. She try to find solution for them. And finally find how the witch like lady die and what is the creature and why it always warn her and who it was.