Mizuki Tsujimura is a well-known author of bestselling mystery novels in Japan. Her groundbreaking novel LONELY CASTLE IN THE MIRROR combines Japanese fantasy elements with urgent themes about emotional wellbeing and overcoming loneliness. It won the highly coveted Japan Booksellers' Award, voted for by booksellers as the book they most like to hand-sell, and became an instant no.1 bestseller in Japan, selling over half a million copies. Tjsuimura has also won the Naoki prize for her work. Rights have sold across the world. Tsujimura lives in Tokyo, Japan.

Naoshi Arakawa made his debut as a manga artist in 2007 with Tsumetai Kousha no Toki wa Tomaru (A School Frozen in Time), a manga adaptation of the award-winning mystery novel by Mizuki Tsujimura. He made his U.S. debut in 2015 with Your Lie in April, which along with its anime adaptation in 2015, became a hit with American audiences. His most recent series is Farewell, My Dear Cramer, which is currently available as a simulpub series and is the sequel to his Sayonara, Football manga about girls' soccer.