Mi Na is a normal high school student who skatesboards to school every day and has an unacknowledged crush on family friend slash local tennis star Jong Min, who is her fellow student. Also Mi Na has the superpower to turn invisible twice a day.

• Kang Mi-na
• Byeon Woo-seok
• Im Won-hee
• Lee Min Ryung
• Yang Hye-ji
• Lee Jini