ハーレムDAYS

Main character is an ordinary student who often skips classes in favor of club activities and part-time jobs. One day his childhood friend Haruka barges in and decides to live at protagonist's house. Then Haruka's elder sister Chiaki comes to persuade Haruka to return home, but stays to live together to protect her sister from man's advances. Is this the beginning of a harem? [From vndbreview]