It is permissible to write fictional stories if they have a message and promote goodness and righteousness. As for using the texts of the Qur’an and Sunnah in the stories, if it is done in an appropriate manner, it does not seem that there is any reason to disallow it. See the long answer.

Nashids are permissible whether recited individually or in unison, but no forbidden musical instruments should be used, and they should not be the focus of the Muslim’s mind. Also, nashids should not be recited by women (in front of men), or include haram or obscene speech.