Feel Good to Die

Both have a male protagonist who is a bit of an asshole and his female subordinate who tries hard to tolerate him even thought his impossible character.

Both involve a possible romance between them.

The two have temporal loops related to their boss.......................................................................

Gong Ah Jung, a level 5 Ministry of Culture official, gets entangled in a web of lies when she mistakenly lies that she's married to Hyun Ki Joon, a noble hotel manager from an affluent family. Their relationship is further complicated when Ki Joon's ex-fiance and a close friend of his brother's, Oh Yoon Joo, reappears in his life.

Both deal with a time loop that gets activated with a certain event happening.both lead characters undergo a lot of changes

The protagonist enters a time loop along with her boss...........................................................

Both have a male and a female lead, which future and past can get re-written. They fight against an invisible opponent, who tries to harm the male lead and do their best to stay at the right time and place and possibly together.

Dojima Otaro works as a popular host. Because of a past incident, he believes that love makes people unhappy. He now only pursues money and power.
A mysterious woman appears in front of Dojima Otaro. The mysterious woman has a pale face with red lips. She kisses him and he dies, but the next moment he regains consciousness. He realizes he is now 7 days in the past. The mysterious woman also follows him. Due to her kiss, Dojima Otaro dies and goes back to the past over and over again.

U can feel the same office aura, with our FL being belittled by her boss, and having to watch her Co workers go through a lot. She finally explodes and the journey begins

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Both are fantasy dramas involving time loop and characters gaining awareness of that fact. While Extraodinary You focuses on school life Feel Good To die is about a corporate office of a chicken conglomerate.

Both dramas feature time travel - the main character re-living the same day to save another character from dying.

The change of the cold-blooded boss who is wanted to be killed by everyone. Bosses have cold-blooded, perfectionist, unforgiving personalities. Everyone blames them for what happened to them. The bosses, on the other hand, learn how they appear to others, both through love and some events that happened to them.

Charismatic male lead
Boss employee relationship.
Mystery and crime
A boss who receives threats.
Company games

both are a supernatural/fantasy office romance drama, they are both super cute, light and refreshing

The only similarities between these two are the writer's usage of "time-travel" or "time-altering ability" to further the plot. In FGTD the FL is caught in a time loop and the only way to break free of it is by keeping her boss from dying. In Kairos, the ML lives a month in the future and, by communicating with the Female Lead, they work together to help each other avoid disaster (which includes death).

FGTD is mostly a comedy with some melodrama towards the second half; while Kairos is a more serious drama.

In addition, the FLs in both shows are very active, opinionated, and stubborn; while the MLs are portrayed as aggressive and arrogant at first, but they change as they face problems, learn from their mistakes and begin to rely on the FLs.

Both shows:
1. Are parodies of their genre, as such the comedy takes precedence over everything else.
2. Despite the absurdity, there's a good and heartfelt plot at its core.
3. There's a lot of character growth from the main leads.
4. Main leads establish a balanced relationship, in which they bot learn and get something from each other (rather than one having all the power).
5. FLs kick as in their own way. They don't allow anything to stop them, always take the initiative and are pretty active.
6. MLs are soft guys with a tough exterior and they trust and rely on the FL.
8. FLs have a support group of friends.
9. Antagonists/villains are over the top and slightly on the cartoony side (which adds to the hilarity).
10. There's a love triangle in both series, with a SML pinning for the FL.