After Sun-Young misses a proposal deadline and gets Ho-Jun reprimanded by his superior, he takes punishment into his own hands. During overtime, he spanks her and orders her to wear a vibrator for a full day.
After celebrating suhyeon birthday by blowing out the candles on a small birthday cake, inha asked to visit suhyeon’s apartment and stay overnight there because, on that special day, all the attention would be focused on inha