Adolescent niece practices creampie sex with her uncle without telling her parents about becoming a popular gal

An innocent girl who loves anime transforms into a gal! In order to become a popular gal, she secretly trains her uncle to have creampie sex with her uncle without telling her parents!! ★Airi, an otaku girl who was dumped by her classmate Ichinose-kun, decides to become a gal in order to become a woman that Ichinose-kun likes! And then... for some reason, with my uncle's advice, I decided to practice "cream sex"...is it common for girls who are currently thrilled to have creampie sex...? ? ★Adolescent gal sex diary that is secret from dads and moms☆