This bright girl falls in love with a clumsy one. —but still had a cool appearance. He was actually her classmate when they were on elementary school, but she didn't notice him. She'd choose to keep her feelings by herself, until one of her friends, suddenly finds out by looking at her phone— she saved a photo of him on her phone. She once denied it, but then she gave up– she finally admits it. But how's Myungsoo's reaction due to her feelings?