Noragami After Manga Novel

Eversince Noragami manga ended, many fans were devastated and felt the emptiness because of the bittersweet ending... The author of noragami "Adachitoka" made the final chapter of manga open ended so fans were not sure if Yato and Hiyori ended up together.

So I was thinking of continuing her work via novel, but the only thing is I have no support right now, I dont know if anyone would ever want to read this continuation.

Though if I ever wanted to start this, I will put Yato and Hiyori's fate on a coin flip.

Not familiar with the manga, but I was once challenged to write a different ending to "Les Jeux Sont Faits" (a novel by Sartre where a terrorist and a party girl meet after death, fall in love, and get a chance to go back to their lives; if they can get back together within a set number of days, they can continue their lives as a couple, but if not, they die again - in the novel they fail both at getting back together, and in completing the tasks they died for the first time; my version had them at least completing their tasks, and knowing that was why they failed to gain new lives).
Continuing someone else's story is never easy (and difficult to do without their blessing and the support of the copyright holder). If you choose to do this, good luck.