Rich World Entertainment's upcoming girl group HIGHSCHOOL showed of some magic in a mysterious teaser video for Soeun. Soeun can be seen crushing a can with help of some invisble force while hanging back in her chair. What the teaser is for exactly has not been clarified, but this could be a teaser for her solo debut. On the 3rd of August, singer and producer Rich announced through his Instagram that he and the company had decided to let all of the members release solo tracks ahead of the group's debut.

HIGHSCHOOL already gathered some attention for their pre-debut concept. All the girls wear masks to hide their faces so people will focus on their talents instead of judge them on their visuals.

Three of the four members have been officially been announced: Heabin, Soeun and Yebin. A fourth members was supposed to be announced within a week after member Dami left, but no official statement has been named. On this video for Soeun however, they linked the Instagram of a girl named Lily, who uses the highschool_ handle, just like Soeun and Haebin who have already officially announced thir accounts through the group's Instagram.