This was very soft, comforting and fits Lucifer's character perfectly. I think it could play out in both Obey me! and Obey me! Nightbringer.
The kisses were a bit too soft for me, but alas, this is no smut.
Yamashita-san's voice is very relaxing and the voice acting is spot on, the ASMR is great too. You can listen to it multiple times without getting bored of it.
Overall, it is worth the price.