Board Thread:Questions and Answers/@comment-33063265-20190713085640/@comment-24727405-20190713144643

Not to mention Otsuka is busy on helping the author  雨蛙 ミドリ (I only found this on amazon and can't translate his name) on illustrations of the LN series オンライン! aka "Online!" So while Tappei is working on the LN and season 2, Otsuka is helping on another author. So both of them have to multitask.