looking for manga title that i forgot

[ghoztkomik]

the story about humanity "battle royale" almost like Future Diary
i read several years ago

something i remember (but maybe im wrong)

• the mc is girl got chosen by something like strongest god or demon (not sure, but i think is demon rather than god)
• she is overpower, however she didnt like to fight and didnt care about battle royale and focus on school and studying
• each participant of battle have something like guardian like god or demon
• she living alone and diligent girl cinnamon roll

 

[panzerkampfwagyu]

I think this is the one you mean

 

[ghoztkomik]

I think this is the one you mean

thats it...thanks a lot...