Upcoming girl group HighSchool teased their debut by spoiling a little bit of the demo of their debut song on Instagram. They also gave an English translation of the lyrics used in the spoiler:

High School High School High School High School 
I'm not even 100 points satisfied. 
High class High class High class High class
It's going to go up higher! Oh!
UP&UP X

HighSchool is aiming to make their debut somewhere in March