Am I allowed to write a genderbander fic?

The story will be like this, 

Kim Sunggyu is soon to be a pastor on the biggest church in Seoul. And when his father have a meeting with his friend name Muhammad Ardan, which is Korean name is Nam Joonyoung. He is fall in love with the high priest of the one and only mosque in Seoul.  the said girl wearing veil,  all over her face but her eyes didn't

Sunggyu don't know but he kind of attracted to her. her politeness, and the way she is talking. it was so calming,  Sunggyu later found out that the girl name is Annisa, Nam Woohyun is her Korean name

Unfortunately​ for her, that she is fall in love with someone who is soon to be Pastor. she is a Moslem, and she didn't allowed to married someone with different religion. it will be hard for both of them. Nam Woohyun was in dillema, about who will she chose.

her love, or her religion. because Sunggyu secretly asked her out. 

it will be hard for both of them who had different religion. Sunggyu Will be a pastor, and she is daughter of high priest of larger mosque Seoul.