↑ Oshi no Ko Manga: Ch. 84 (p. 8). ↑ Oshi no Ko Manga: Ch. 100 (p. 6), Kana is 18 before going off to meet the director and Ruby is 1 year younger than Kana. ↑ Oshi no Ko Manga: Ch. 117 (p. 7), it has been 2 years since Aqua asked Kana to become an idol....