The product is an English manga titled "Hatsune Miku: Unofficial Hatsune Mix" by artist and writer Kei, published by Dark Horse Comics in 2014. This softcover manga features the character Hatsune Miku in an unofficial series, catering to fans of the popular manga tradition. Kei's unique style and storytelling bring a fresh perspective to the beloved Hatsune Miku franchise, making it a must-have for collectors and fans of manga and Asian comics.