While NiziU member Maya transformed into a picture book author, member Rio revealed her passionate fandom, creating a heartwarming atmosphere.

On the 21st, the video 'NiziU MUSIC STATION SUPER LIVE 2025 Behind' was released on NiziU's official YouTube channel. The video showed members celebrating the publication of Maya's picture book in the waiting room for the year-end stage.

On this day, Mako drew attention by personally bringing Maya's physical picture book to the waiting room. Mako praised Maya's book, saying, "It is truly the best work, with a cute art style that makes it easy to read emotions, as well as the warmth exuding from the text," and added, "I displayed Maya's book well on the bookshelf in my room."

Then, an impromptu 'Author Maya Fan Sign Event' was held in the waiting room. Miihi held out the book and asked for an autograph, and although Maya was shy, she said, "It's my first fan sign event. You are the first reader," and signed it with care. At Rio's request, she even wrote the message "To cute Miihi," creating a harmonious atmosphere.