"Serious Kuzu," or Mashima Kuzumi, is a kuzu-ya with a serious skin! Mashima had many skills to deceive his teachers and his classmates, not being conspicuous, and easily living in school. But strange students, such as the real Kuzu Oden, who is interested in Majima, the grave of the class, Kiyokawa, and the mysterious female "Looking At Him," begin to gather around Majima! The New Generation of Kuzu Hero, Mashima Kucho's Youth, Daily Life and School Comedy!