Yoon-yi is a secretary who works at YB Headquarters; one day, while running a special errand for her boss, she encounters Chi-won.

Mr. Bong's wife mistakes Yoon-yi for her husband's mistress and all kinds of rumors spread at the office; Tae-geun advises Chi-won to get a personal assistant; Jung-ae tells the three jugglers about her secret.

Yoon-yi tells Chi-won that she will stick to him like glue and do her best as a personal assistant; Chi-won is bothered by the invasion of private space; Yool tries to win Yoon-yi over.

With Chi-won moving in as a tenant, Yoon-yi has the upper hand at home; she sets house rules for Chi-won and indulges in having power over him; at work, however, the situation has not changed.

Yoon-yi gets to know Chi-won through the questionnaire he filled out; Bo-na is still upset about what happened at the bar; when Yoon-yi hears a strange noise from the basement, she becomes scared and knocks on Chi-won's door.

The new employee at Yoon-yi's workplace turns out to be her ex-boyfriend; Bo-na is pressured to prepare for the Best Boss Award; Yoon-yi has difficulties in talking Chi-won into it; Yool orders Jung-ae to get him the limited edition basketball shoes.