So Chapter 3 is up and....
Spoiler for Chapter 3:
It seems like the Shinigami is trying pretty damn hard to get Kaoru to slip up. At this point, I'm suspecting that Lisa is a very repressed and depraved pervert, considering the fact that she doesn't mind getting a wet t-shirt in front of Kaoru.
And the school idol girl is, in the words of Kaoru, a "hardcore sadist". And I'm inclined to agree.