Onii-chan! (An Osomatsu-san Story) DISCONTINUED
Professor Dekapan invents a new potion that can revert someone's age, turning them back to their youth. Iyami somehow gets his hands on this concoction thinking he could get famous for his "youthful beauty". A mishap happens and it ends up in Chibita's oden. The now infected oden is coincidentally in some of the Mats...
Completed
