Following a sudden promotion in a leading assets-management firm, Chaeyoung, Dahyun, and Jungyeon learn from superior Nayeon that their company's real trade is in illegal shipments and human trafficking. Prodigial cryptographers Chaeyoung and Dahyun find themselves being used to further shady business aims all around Asia, but Chaeyoung gets caught in a dilemma when she tries to save Myoui Mina, a young geisha, from trafficking and exploitation. Meanwhile, J

Reclusive scholar Mina has been trying to campaign for better integration between the spoilt rich kids and average college-goers in the hostel community. On a particularly bad day, wealthy transfer student Hirai Momo shows up at her door in a duck onesie to test her patience. Hijinks ensue.

Mina cooks in the mornings with just a large shirt on. This is more than enough to catch Momo's attention.

Momo tries to weasel her way out of a late record by cosying up to the teacher’s assistant. She announces her plan during the last class of the semester. Jungyeon tells her it is a stupid idea, and that it will never work. Sana, who knows TA Mina, thinks it just might.