Shinjuro Rengoku from the manga Kimestu Academy is the master of the Kimetsu Town Sword Dojo, however as of late the number of students has been decreasing drastically and nowadays he barely has people to teach which has soured his mood turning quite grumpy and lazy, he found confort in food so he is often ordering take out from delivery apps which has caused his waistline to skyrocket now barely fitting in his yukata which doesn't help sell his image to get more students.