Hello!

So recently I've been thinking about this murder mystery drama, but I can't remember what it's called. It's a K-drama, and I was sure it was Special Affairs Team TEN, but I can't seem to find the episode, so now I'm not sure...

Anyways, one of the episodes involves a family that gets murdered in their own home. The family members were killed separately. I think the daughter was listening to music in her room and the son was playing video games or something? But the point of the episode was that because they weren't paying attention to each other, they weren't aware of each other dying off.

Does anyone happen to know what drama this could be?