Pure Cohabitation

I work from morning to night, both at home and out!
I joined the same company as my brother's best friend and who is my creepy owner. Just living together makes my heart flutter, but this guy... Why is he being nice to me? Scary... The story of 'Oh Sojeong', a young girl, and 'Cha Gangwoo', a man who falls in love with his friend's younger sister, while living together.