Ryuuichirou Isaka

Serving as the executive Director for Akihiko’s publishing house, this influential figure maintains deep-rooted connections within the industry. Beyond his professional authority, he shares a long-standing history as the childhood friend of Haruhiko, the brother of Usami. His position of power and established personal relationships place him at the center of the series' social and professional dynamics, making him a pivotal character in the ongoing narrative.