Ugh Kaoru is such a disgustingly manipulative person. Shizuka really should have cut her out of her life.
Well she tried to, and it didn't go so well.
Only because she didn't stick with it. I find it extraordinarily unlikely that Kaoru was actually a real danger to herself considering how much of an egoist she is. She wasn't trying to kill herself she was going on a hunger strike to guilt-trip Shizuka into continuing to put up with her awful behaviour.
think ur confusing hunger strike with depression.it happens...trust me on that.
the only reason she got better is because shizuka forgave her but not enough to become lovers again which is what kaoru desperately wants.