In the recent 29th edition of Shogakukan’s Weekly Shonen Sunday magazine, it was announced on Wednesday that the manga collaboration between Boichi (renowned for Dr. Stone) and writer In-Wan Youn (known for Defense Devil, Island, Shin Angyo Onshi) titled SuperString: Isekai Kenbunroku will be temporarily suspended due to unforeseen circumstances affecting the author.

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Boichi and Youn debuted their manga in Weekly Shonen Sunday on April 19th.
The manga revolves around the journey of a young man who valiantly safeguards his loved ones and battles single-handedly. Within the narrative, warriors from diverse realms descend upon Earth, engaging in an epic conflict. The magazine aptly characterizes it as an exhilarating, interdimensional action series reminiscent of the adventures of Marco Polo.
SuperString intertwines with the Super String intellectual property (IP) from YLAB, a Korean company. This captivating IP unites characters from various YLAB creations within a single universe. While predominantly centered around manhwa, it also encompasses films, musicals, live-action productions, and games.

In June 2022, LINE Digital Frontier made an exciting announcement that Boichi would soon launch a new webtoon series called “SuperString” in collaboration with Youn. This highly anticipated series was set to debut on the LINE Manga app in mid-2023.
Renowned manga artist Boichi, known for his works like “Sun-Ken Rock” and “Origin,” joined forces with Riichirou Inagaki, the talented author of “Eyeshield 21,” to create the widely acclaimed “Dr. Stone” manga. The series premiered in March 2017 in Weekly Shonen Jump and concluded in March 2022. Around the same time, fans were treated to a new chapter in Weekly Shonen Jump coinciding with the airing of the Dr. Stone: Ryusui special last July.
In April 2022, Boichi embarked on a different creative endeavor with the launch of an essay manga titled “Zessan Sekaimeshi: Tabereba Konoyo no Subete ga Wakaru” (Amazing World Food: Understanding Everything About This World Through Eating). Regrettably, the manga came to an abrupt end after only three chapters. Boichi cited “something sad happened” as the reason for discontinuing the series.
Youn’s manga works, such as “Island” and “Defense Devil,” have been successfully released in English, gaining recognition among international readers. Additionally, the popular manga “Shin Angyo Onshi” served as the inspiration for a 2004 anime film that received an English release under the title “Blade of the Phantom Master.”
Source | Weekly Shonen Sunday issue 29