Oshikake☆Panic

Living together with a girl unexpectedly!? One day, the main character meets a girl at a game arcade. Her name is Manaka and she has just run away from her home. She suddenly says, "Are you living around here? Living alone? Can I stay at your place?" Also, she lets him have sex with her in return... Rich sex every day... However, she seems to be playing with him rather than serving him...