Takao Saito's manga Skull 13 was released in volume 201 of the one-shot book. Promotional images commemorating the release of this game were also released. On this promotional chart, you can see the text that updates the world record for the number of volumes sold in a single line of works of the same series.
Previously, this record was created in 2016 by Akimotoji's Oolong Police Station, volume 200. The 201st volume of Skull 13 also updated this record.
Skull 13 tells the story of Skull 13, a super-first-class killer code-named "Duke". The series began in 1968 and was animated on TV in 2008.