The Apothecary Diaries and COSMOS Get Cross-Manga Collaboration Cards
A bookstore fair starting June 18, 2026 offers newly drawn collaboration illustration cards featuring characters from The Apothecary Diaries and COSMOS. Customers who buy Volume 22 of The Apothecary Diaries: Maomao's Imperial Palace Puzzle Solving Notebook or Volume 9 of COSMOS at participating stores receive a card. The cards are drawn by the opposite series' artist: Ryohei Tamura draws Maomao and Jinshi, and Minoshi Kurata draws Rin and Mizumori.