Love Cheque Charge (2014)

In Love Cheque, the main story is about a male ghost involved in matching the lead couple who are boss/employee falling in love. Oh My Ghostess involves more paranormal/fantasy in its storyline, while LC includes 3 love stories.

In both series, quirky bosses fall in love with their employees. In LC, the main male lead befriends the spirit of main girl's ex-boyfriend.
SPOILER>>> In LC, the the girl's ex (in spirit while in comma and healthy after recovered) helps the lead couple.
In MS, because the lead girl was in comma and her spirit wondered, after recovering, she gained paranormal senses which lead/ help develop the relationship with the lead actor.

In LC, main story is about the male lead (boss) and lead girl (employee) falling in love, helped by a spirit (girl's ex-boyfriend).
Halfway through LC, once main lead accepts being in love, he is steadfast and works out problems with girl (except the last 5-6 chapters). Boss & Me is sweeter, fluffier, and funnier.

Main story is about the male lead character (boss) and lead girl (employee) falling in love, helped by a ghost (girl's ex-boyfriend).
Halfway through Love Cheque, once main lead accepts that he's in love, he is pretty steadfast, working out problems with girl (except the last 5-6 chapters). Both have happy endings. Fox's Summer is funnier and girl is sassy and feisty.

Both dramas take place in a office and has the male boss/ female employee theme.
Both female leads like the male lead first, but quickly change their love into hate. The couples end up together in the end.
On a side note, both female leads have a poster of the male lead in their room.