Aienkien ~Kashiwagisou e Youkoso~

Main character arrives to a small town to enter a college. His apartment manager Asahi is a cute girl, and he soon finds himself in relations with her. But there is also a strange person Yuki, Asahi's mother. Actually, she is a ghost. Protagonist wants to lead a normal college life, but these two females don't leave him at peace.

[From vndbreview]