He posted on twitter
Hello. I am a brother who lives only for today.
First of all, I would like to sincerely apologize to the readers who have been cherishing my works for the confusion and disappointment caused by the long hiatus or delay in the completion of "Dear Zero Zero," "Fowl's Start," and "Only Dealing with Villains."
As a writer affiliated with the company, I have been serializing the above works, but due to the company's business circumstances, I have recently ended my affiliation with the company.
During this process, the serialization of these works was interrupted, and due to contractual and copyright issues, I was unable to continue the series at my own discretion. This has caused concern to readers who have been waiting for the next story.
There's a misconception that I'm responsible for the long hiatus or delayed completion of these works. However, I want to assure you that this wasn't a personal decision, but rather an inevitable consequence of production circumstances. I still cherish these works and hold onto the hope that they will eventually be completed.
The unexpected termination of my agency left me with a difficult foundation for continuing my creative work. I'm currently exploring ways to complete my existing works while preparing for new projects, taking advantage of this opportunity.
I ask for your continued trust and support. Thank you.
( ╥﹏╥)

There was a contract issue with the company, and because of that, the author said that he couldn't come back to the works that were on hiatus. He posted a notice about this and said that he would look for a way to come back for now, but since he came back with a new work in the end, I think we'll probably have to give up and let him go.
+ If you want to know more details, it's on the author's x, so please refer to it if you're curious. (/TДT)/