A world full of life with crimes...being corrupt by powerful mafias and the government...but what if one day you're parents sold you to one of the most powerful mafia families in Japan and made (forced) you to marry their son...
- two penpals swore an oath to never discover their true identities aside from names, that is, up until one day haeun unknowingly finds herself transferring to the same school as her penpal, riki nishimura - the difference? he knows that she's his penpal, and she has no idea