Anata Dake Konbanwa 4

Yoshisuzu Shougo inherits his grandfather's mansion, which he lives in after his death. He shares a residence with the maid, Otosumi Youko. Shougo often has intercourse with Youko, but while he is in the half-awake condition that follows the climax, he always gets a vision of a gorgeous female. The girl's name is Reiko, and her portrait hangs on one of the mansion's walls.