Masamune is a Japanese novelist. His work "Soul Synchro Machine" won the 18th Sneakerbunko Grand Price and was later renamed to "Masou Gakuen HxH" and published in February 2014. The same work has received an Anime adaptation in 2016. In September 2016 Masamune starting writing his second series "Ecstas Online". After partially writing the script for the Anime adaptation of his work, he started to write scripts for other Anime as well, namely "Hajimete no Gal" and "Ore ga Suki nano wa Imouto Dakedo Imouto janai". He has been writing a few other series since then, and mainly writes for the Kadokawa label Sneakerbunko.