Heeseo, who was on a successful career path at work, finds her life constantly getting complicated due to her strong 'yin energy' constitution. Her shaman grandmother tells her that to suppress yin energy, she needs to receive yang energy, urging her to quickly 'catch' a robust man. Heeseo scoffed at her grandmother's words, but then she fell for the intense yang energy of Team Leader Gong Taesu, whom she met at a company dinner, and ended up spending a passionate first night...

"Don't you remember that time? What you wrote on my face."