Hana finds that it’s difficult to take care of your best friend when your best friend has all the self-preservation instincts of a lemming. Hana doesn’t know how this happened. No, wait, she does know how it happened. Kyoko made that pleading face, and Hana is weak to the pleading face. She knew Kyoko made poor life choices, but she didn’t realize they were contagious.

There are a lot of things Hana doesn't know; she's okay with that.