In the manga, the duration of Gojo's seal is not clearly defined. It's left somewhat open-ended, allowing readers to interpret it based on the context and events that follow.
Chapter 58 of Jingjiu's novel was locked because the author had a problem during the update process or because of copyright protection and other reasons that prevented the chapter from being published or distributed without authorization.
In this case, the author or copyright owner would need to be contacted for a solution. Some authors might republish the chapter, and some might negotiate with the copyright owner to resolve the issue. If the chapter is a classic novel, it may involve copyright issues. You need to contact the relevant copyright owner or copyright agency to find out more solutions.
If you have any questions about the plot or the content of the chapters, you are advised to read the original version or contact the author or copyright owner.
Nope, Marin and Gojo don't end up as a couple in the manga. The manga follows a different narrative path for their relationship, concentrating more on other aspects of the story and character growth.