月刊少年マガジン
"Welcome to the Ballroom" is written and illustrated by Tomo Takeuchi. The manga began in Kodansha's "Monthly Shōnen Magazine" in the December 2011 issue, published on November 5, 2011. The series went on hiatus in February 2016 due to the author's poor health, but returned in the February 2017 issue. The series went on another hiatus for two months from December 2017 due to the author's health, however, did not return during the expected timeframe, and was instead expected to return in April 2018, but due to further health issues, the manga remained on hiatus until further notice. On May 13, 2019, it was announced that Takeuchi was preparing to resume working on the manga, later announcing in the July 2019 issue of "Monthly Shōnen Magazine" that the series would return on July 5, 2019. In the February 2020 issue of "Monthly Shōnen Magazine" published on January 6, 2020, it was announced the series would be on an indefinite hiatus due to Takeuchi's continued decline in health. The series later resumed in the August 2020 issue of "Monthly Shōnen Magazine" published in July 2020, but took a one-month break in the November 2020 issue published in October 2020 due to "establishment of a new system and the replacement of assistants".