After rereading this, I like it more than I did first time round, I think. It's an ending that fits the ridiculousness that this manga dedicated itself to.
It's by no means a "good" story but it was sure as he** entertaining. Hayashi never managed to grow on me as a character, let alone a main antagonist, but her death by Etou's hands was satisfying.
I'll probably read this again someday, maybe because I've fallen in love with Hanazono and Kamishiro myself :3
I love when she admits she actually does really like him. And how he only ever says perverted things as a facade, but would rather die than take advantage of her.