A light novel written by Wataru Tō and illustrated by Ponkan⑧ The 15th-anniversary mook for *My Youth Romantic Comedy Is Wrong, As I Expected* (*OreGairu*), titled *My Youth Romantic Comedy Is Wrong, As I Expected: Toki*, will be released by Shogakukan on Friday, September 18, 2026. To commemorate the series’ 15th anniversary and cumulative global sales exceeding 15 million copies, the book features never-before-seen early materials, in-depth interviews reflecting on the past, and celebratory columns themed around the number “15.” It is A4 size, 124 pages, and priced at 3,520 yen (tax included).