ONEZ-136 I can't believe that I, a popular light novel author, am spending such naughty days with my tsundere sister! - Aya Sasami

Just like the main character of an anime! - A heartwarming story about a light novel author and his naughty tsundere sister! - The main character, who can't seem to get a new light novel, uses his own sister to make a naughty request! - The unstoppable barrage of dirty talk makes my little sister get horny and have sex with her! - ? - I creampie my tsundere sister over and over again! - Don't miss the opening video of the first challenge as a leading role! - In addition to sex, there are many off-shots that fans will love! - Aya-chan's amazing work full of charm that you will definitely love!