After the National Tournament, Karen and Ayame happened to see a flyers where food and pastries are the main prize of an contest event, which enticed the two girls, but were taken aback upon learning that the requirements is that it needs a pair consisting of a boyfriend and a girlfriend. Karen and Kengo enters while Ayame is thinking whether to enlist someone for help.

After Taiki leaves, Chinatsu ponders further on the relationship they might've had. The moments they could have shared if things were just a little bit different. A continuation of Chapter 48. Originally published in 2022.

Chinatsu and Nagisa head home together down a night-lit street, after cheerful celebrations of clinching a nationals berth. Unbeknownst to her best friend, romantic feelings are boiling in Nagisa, ready to burst at any moment.

A BLUE BOX / Ao no Hako fanfiction. Since new year's day, Taiki Inomata and Chinatsu Kano began dating in secret as both agreed to keep their relationship a secret until Chinatsu graduate. But a series of unanticipated situations and coincidences cause their secret relationship to gradually get exposed, where their schoolmates, and even Taiki and Chinatsu's families find out

Blue Box/Ao No Hako (current Weekly Shonen Jump manga) one-shot! Taiki Inomata plays bton, while Chinatsu Kano plays basketball. Every day the two of them are the first to the gym to practice their respective sport… but what if they decided to help one another learn the opposite sport, just for one day?