Oraenmane, Halkkayo?

Never in my life had I felt bad luck... Until now... The editor-in-chief at my new company is the ex-boyfriend I had a bad breakup with?!

The scruffy looking A-Jun that disappeared long ago has now changed completely. Since his first day on the job, Shin had been suffering from A-Jun's harassment overtime. In a fit of anger, he has a one night stand with someone else then heads to work. But seeing Shin, A-Jun begins to feel mixed emotions.

(Source: Peanutoon, translated)

Note: Chapter count includes a prologue and 8 extras.