Yoo Jeongyeon, a girl who has PTSD, suffers a huge amount in her daily life, she isn't really comfortable with anyone who she isn't close with like her family and friends. Myoui Mina, daughter of the most successful CEO in Japan and most successful Mafia boss in Japan, is a troublemaker and a badass cold to anyone who isn't her siblings or friends, she spent most of her time. What happens if both girls meet?