Upon graduating from the Hero Academy, Lulu seizes the opportunity to demonstrate his heroism to a society that has consistently underestimated him. Embarking on a grand quest to vanquish a fearsome and mythical dragon, Lulu’s plans take an unexpected turn when his doting and overly protective grandmother insists on accompanying him. What was meant to be a liberating adventure filled with valor, battles, and romantic encounters transforms into a familial expedition that pushes Lulu’s patience to the brink.