A collaboration visual between the popular anime "Mr. Osomatsu" and "Welcome to Demon School! Iruma-kun! Iruma-kun" has been released. The visual commemorates the 10th anniversary of "Mr. Osomatsu" and the broadcast of the fourth season of "Welcome to Demon School! Iruma-kun-kun," and shows the six brothers, who have come to the demon world where Iruma lives, dressed in the uniforms of Babyls Demon School, striking the "Sheee!" pose together with Iruma. The visual gives the impression that the six brothers have transferred to Babyls.
It was also announced that merchandise featuring the same visual will be sold. Further details will be announced on the official websites and official X accounts of both works.
"Mr. Osomatsu" is based on Fujio Akatsuka's gag manga "Osomatsu kun." It depicts the daily lives of the six brothers as adults, and its outrageous gags have made it popular, especially among female anime fans. The first season of the TV anime aired from October 2015 to March 2016, the second season from October 2017 to March 2018, the third season from October 2020 to March 2021, and the fourth season from July to September 2025. It celebrated its 10th anniversary on October 6, 2025.
"Welcome to Demon School! Iruma-kun" is based on the manga by Osamu Nishi, which is serialized in "Weekly Shonen Champion" (Akita Shoten). It's a school comedy about Iruma Suzuki, a boy sold to demons by his selfish parents, who enrolls in a school in the demon world and has to live his school life while hiding the fact that he's human.
The first season of the TV anime aired on NHK E Tele from October 2019 to March 2020, the second season from April to September 2021, and the third season from October 2022 to March 2023. The fourth season will air on NHK E Tele every Saturday at 6:25 PM starting April 4th. It will consist of 24 episodes and will be broadcast over two seasons.
