"The one who always shines in my hearts" Seohyun and Chorong were best friends since they were childhood. They always like to gather around or sharing things to each other. 

Seohyun, who was a teenager girl, been offered from 'Seoul Boy Highschool' to be a young teacher at there. Even though she's still in 17 years old, but she already had a degree. Because she was so smart yet bookworm girl. She don't want to leave this chance, so she agreed to the offer. She thought that it'll be good if she be a teacher at there, but she wasn't. She can't imagine what would happen if she'll continue her job at th