The 93 chapters of the vampire knight manga were not the ending but one of the side chapters. Vampire Knight was a Japanese manga created by Shuliang. The ending of the manga was about the final battle between Vampire Hunter D and the Vampire Knight in chapter 92. Chapter 93 was a side story that told the story between the Vampire Knight and Zero's demonic spirit.
In chapter 1, the main character meets the prince for the first time in a rather unexpected way. There's a lot of mystery and anticipation built around this encounter.
The first chapter of 'A Tackle on My Life' manga mainly focuses on establishing the background and the main character's personality. There's a mystery element introduced that keeps you hooked and wanting to know more.
I'm not sure specifically as I haven't read it in full. But generally, it might be about a vampire system which could involve things like vampire hierarchies, powers, and how they interact with the human world or other supernatural elements.