While exploring a strange ruins called Kallasliland, the foursome of Gonzo awakened a powerful vampire (or zombie?), Which ended up causing serious injuries to both parties. When the vampire used a magic called time retrieval to treat the wounds caused by telekinesis, it was interrupted by Xiaojie and the others, so the foursome were swallowed by the magic circle and traveled through the worlds one by one according to the worlds the vampire had visited. By the way... Change the plot beyond recognition...
List of characters corresponding to Gon, Qi Ya, Kurapika, and Leorio:
"Harry Potter": Harry Potter, Ron Weasley, Draco Malfoy, Dudley Dursley (...)
"Family Professor": Sawada Tsunayoshi, Gokudera Hayato, Rambo Povino (poof hahaha, I'm so drunk), Yamamoto Takeshi (it's so unreasonable to rush)
"Naruto": Uzumaki Naruto, Uchiha Sasuke, Hyuga Neji, Rock Lee (I almost vomited blood because of Leorio's shell!)
"The Prince of Tennis": Toyama Kintaro, Echizen Ryoma, Fuji Shusuke, Momojo Takeshi (Momo, I'm sorry for making you look like an uncle)
"Attack on Titan": Eren Yeager, (Qiga's character has not been decided yet, I am hesitating whether to let him become her), Armin, Jean Kirschstein (I don't want to say anything anymore...)
Comprehensive comic world: Kuroko Tetsuya (Black and Blue), Ichisei Kudo (Blood Rider), Kudo Shinichi (Conan==), Kurosaki Ichigo (Bleach)
and soon