This story only makes sense if you are aware of a little known fact about halos in BA: only Sensei sees the elaborate designs of the halos, marking every student with a unique identifying feature. Everyone else sees ordinary circular discs.

Otherwise disguises like Kisaki's would be easily seen through by other students.

Shun knows because she's the one who gave Kisaki the kindergarten uniform.

1123581321345589144 said:

This story only makes sense if you are aware of a little known fact about halos in BA: only Sensei sees the elaborate designs of the halos, marking every student with a unique identifying feature. Everyone else sees ordinary circular discs.

Otherwise disguises like Kisaki's would be easily seen through by other students.

Oh, I definitely need to ask where that is, I want to learn the details