Yeah, I understand what you mean with Voice. It does get repetitive, but I guess I'm watching for the interaction of the five Forensic students/friends.
I just started watching A Sleeping Forest (1998) and the opening scene is quite similar to Innocent Love's opening scene. Both have a family that was killed on Christmas Eve, both feature What a Friend we have in Jesus song, except in A Sleeping Forest, the parents and the oldest sister dies and leaves a sole survivor the younger sister. The person who is suspected as the killer is the older sister's boyfriend whereas in Innocent Love, the older brother of the main character is prime suspect and was arrested as the murderer. Oh and Innocent Love didn't have a rainy Christmas Eve. But the similarities are there;however, the plot is different.