Recommendations

Similar Plot
- long lost sisters
- the sister switching lives
- school life w/ little bit of romance involved

Both movies tell a hopeless love story between a woman and a convict.

Female actor is same. Her role is also quite same in this both show.. I just kind of admire how she became more beautiful now in Meeting you.. looking forward for more of her shows! Both Meeting you and When we were young are also School setting.. <3

Both show is a School setting. I just love school setting tv shows.. and If you want to watch more of the male actor. Accidentally in love and meeting you has the same actor.. and I just like how his transformation in acting.. from one thats very cool and arrogant type in Accidentally in love to a reserve kind in Meeting You ...

The story is also school setting. The Male lead is also same in character more reserve kind and the female lead is also the happy and energetic one.

Both shows deal with characters in different time lines affecting a case. In Tunnel, the ML travels from the past into the future. In Kairos the ML is in the future but can communicate via a phone with the FL who is one month in the past.

The main role is a only red nine-tailed fox in the world.

It is based Xianxia genre. The book name, Three Lives Three Worlds, The Pillow Book. This drama is the sequel another 2017 drama Eternal Love.

Xianxia is a genre of Chinese fantasy influenced by Chinese mythology, Taoism, Buddhism, Chinese martial arts, traditional Chinese medicine, Chinese folk religion and other traditional Chinese elements (SOURCE: Wikipedia)

Eternal Love the main role is a white fox.
It's also known as Three Lives Three Worlds, Ten Miles of Peach Blossoms. It is based on the xianxia novel of the same name. Xianxia is a genre of Chinese fantasy influenced by Chinese mythology, Taoism, Buddhism, Chinese martial arts, traditional Chinese medicine, Chinese folk religion and other traditional Chinese elements (SOURCE: wikipedia)

Both shows feature a character who is a zombie. Not only do they need to learn to control their instinct to eat, but they do not remember why, how or who killed them.

In ZD the ML is the zombie, while in AKO the 2FL is the zombie. They each end up finding a close friend who helps them through their ordeal.

Both are historical dynasty dramas that focus on politics. And I feel TROP might have been much better at the hands of director Patrick Yau. SOTK is a stunning, gorgeous drama shot like a movie (especially at the first episode). It also has better, more realistic dialogues and plot suiting the dynasty times.... The actress to pay attention in SOTK is Regina Wan! She put up such a fine performance *thumbs up*

Both have a feisty lawyer character, from a poor background, both wanting to hit it big.
Both are law dramas with good comedy & melodrama.

They also both:
> Use dark comedy and push the absurd flawlessly within the plot.
> They embrace k-drama tropes, make fun of them yet simultaneously using them to further the plot.
> Have eccentric and unique Male Leads and quirky Female Leads.
> The Female Leads are active in the plot and strive to uncover mysteries. They are both skillfull and stubborn.
> The Leads establish a deep sense of friendship with a subtle hint of romance between them.
> The main antagonist is a serial killer, though in PD he's more prominent than in ZD.
> These two shows make for a light and entertaining watch.

Both are very bright and upbeat, with strong female leads, who focus on their careers. I am confident if you like one of these dramas you will love the other one too.

In both shows:
> The Female Lead has the ability to see ghosts. In Black she's born with the ability, whereas in TOTNT she developes/is given the ability.
> The Male Leads have few friends.
> The Male Leads are't human. In Black he's a grim reaper and in TOTNT he's a fox.
> The Male Leads are constantly protecting the Female Leads, more so when they develop feelings towards them.
> The Male Leads are strong, cocky but hilarious.

Having said that, Black is a lot darker than TOTNT.

The shows are similar in the following themes:
> The Female Lead must navigate a world that feels different from her own and, therefore, she ends up relying on the Male Lead's help and guidance.
> Both leads grow up in a rich family.
> The Male Lead isn't as honest with his feelings towards the Female Lead at first. Though in both cases, their actions are more honest than their words.
> The Male Lead chases the Female Lead first.
> One of the leads is a successful piano player. In CL, it's the ML while in DDSSLLS it's the Female Lead.
> The Female Lead is a bit spoiled but in a fun way.
> The Female Lead is betrayed by someone close to her.
> The Leads met each other prior to the start of the show, with the ML remembering that encounter before the FL does.
> The ML lost someone really important before the start of the drama, which still causes him pain.
> The FL lost her birthmother when they were young.