Author-nim here~ So, The One and Only is based on Astro. The most innocent and happy rookies I ever seen in my life.  There was a girl who always had trouble. People would describe her as clumsy,messy,no life.. Then, she noticed there was a group of boys she never saw around the school. That's when they entered her class. She was in charge of showing them around, {Y/N} was a hot headed person. The only person who can calm her down was her friend SooYoung. 

i think you got the idea~ :D

CO-AUTHOR-OHMARK_BAM  AUTHOR-MXKNAE_