Girl's Day's Hyeri updated her Twitter on 13th August.
She wrote,"Zzazan ~ This time i will star in new singer NC.A's MV, please support NC.A's title song "My Student Teacher", it's a great song".
Hyeri is seen wearing school uniform at the filming set. NC.A stands for "New Creative Artist", the title song "My Student Teacher" is a cute song showcasing the innocent love of a student towards her teacher.
The full MV will be released on 14th August.