shichigoro-shingo drew a cover art for “Invisible” written by Ritsu Shuki will be published by Jitsugyo no Nihon Sha Bunko on Tuesday, 6th June, 2017.
It’s the second of this series by Ritsu Shuki.
More info.
Invisible (Jitsugyo no Nihon Sha Bunko) 
(Japanese text)