: A special Japanese edition included a mini photobook titled "Good Luck To You" ( Kimi ni ko are ).

: During the trip, Erika goes missing during a storm. Hiro, despite her awkward position as Nagi's girlfriend, joins the search and is the one to eventually find a distressed Erika sheltering in a store.

: The digital English volume was released by Kodansha on January 30, 2024. Amazon.com: A Couple of Cuckoos Vol. 15 eBook