Hideyoshi Kinoshita is a class 2-F student in Fumizuki Academy. A classmate of Akihisa since 1st grade. Hideyoshi is the fraternal twin of Yuuko Kinoshita, class ambassador for Class 2-A. He is also a member of the Drama Club. He is one of the most famous characters in the series and in the manga, particularly due to his gender neutrality.

Unlike the rest of Class F, Hideyoshi is relatively calm and normal. Hideyoshi remains stoic at most times, but there are times when Hideyoshi loses his calm demeanor. When mistaken for a girl, Hideyoshi will correct them and states he is male. Despite this, Hideyoshi usually ends up wearing female costumes in the Drama Club. His passion for the Drama Club seems to be the reason behind him being in Class F, due to his focus on the former.