Jhon's sister? (Art not mine)

Soo this is like my third book i just read a book like this and decided to write one of my own☺️
Sorry if its not the best ill try😭
CHARCTERS ARE NOT MINE⚠️⚠️

Describtion:
Jhon has a sister he has never told anybody... he knows about her but she doesn't.
His sister has the same power as him but they were seperated at birth because of ember looking for their mother. Not knowing what to do william decided to hide y/n away not far but not close. One day he tells her the truth how he has hide her from ember and about her brother. She is curious on how he is so she enrolls herself in wellston looking for her brother.

This is kind of a harem im really trying all types of writing so sorry if its badd😄

Also thete levels will be a bit higher then they are in the webtoon
Jhon: 8.9
Y/n: 9.6