Tona-Gura! is a romantic comedy anime that follows the story of Kazuki Arisaka, a high school girl who reunites with her childhood friend, Yuuji Kagura. However, Yuuji has grown into a mischievous and perverted young man, contrary to Kazuki's expectations. The series explores the humorous and awkward situations that arise as Kazuki navigates her feelings for Yuuji while dealing with his antics. It combines slice-of-life elements with lighthearted romance.