Chii-chan Kaihatsu Nikki

Chisato Mashiro is a typical young girl who thinks only of the boys and her Senpai. She is usually calm and obedient but since she entered her teenage crisis, she gets angry easily and often lets go of her anger on her uncle, who is upset about the change of the little girl, once sweet and kind.

One day, she catches her uncle searching her underwear drawer. Furious against the latter who has crossed the line, she lets out a flood of insults and threats. No longer supporting his behavior, he decides in turn to take matters into his own hands and to play a more active role in the education of his darling!