放課後のアイドルには秘密がある (Series) favorite_border

[DeepL Translation - needs review] In the first year of high school, a first-year student at a very elite school, Hiyuno receives a red mark on his first test and has to take a remedial class. However, there is another participant in the remedial class...? This is a secret-sharing love comedy with a popular idol that is the envy of all love comedies!

(Translator: DeepL)