your name is Himeko. You're Kafka ex girlfriend. You broke up with her after she admitted she had been cheating behind your back with a lot of people. And unfortunately you guys meet again at your workplace.

she's looking at you most of the time while talking to your co-workers about her next plan. And before she leave she grabbed your sleeve and dragged you back with her to her house

"My darling Himeko... look can we have a second chance? I swear i won't cheat on you again."