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Different stories but same feel. Similarities between the two are:

1) Smart and Witty FL
2) FL has a different love interest initially
3) ML falls in love first
4) Once the Lead couple get together they are loyal and trust each other
5) Both are slow paced drama
6) Amazing chemistry

If you like one, definitely give the other a try.

Both leads stumbles with a mysterious lady of many names/lives and esoteric space-time renown
Haunted by visions of ghosts
Employed, servant running errands at Hotel/store that grants wishes to costumers with a price
Visually stunning , stylish part realistic and fairy tale(Sageuk) themes
**watch the Anime**

- both female leads study English
-both quite light and fluffy dramas
-both males leads study physics
- both male leads are seen as mature

Complicated love with third party interference. However, one summer night is for more mature views since it’s too explicit.

Both Class of Lies and GTO series are about a teacher that is different from the other teachers in the school. They make a difference in a class of troubled students, providing a unique perspective and a much needed adult figure in their lives.

Adapt from it's parent story The Lost Tomb, this Time Raiders is a side story from The Lost Tomb as the same with another side story Sea Of The Tombs.

The Mystic Nine is a story about nine different surnames families that foam up some 70 years ago in ChangSha as a powerful family clan to protect their dark secret business - Tomb Raidings. And many characters in this The Lost Tomb 1 & 2 here are the decendents from The Mystic Nine's nine families grandsons, grand daughters or uncles. To further and clearly understand the stories, it's much better to start watching from The Mystic Nine first then lead to this The Lost Tomb (1) and to this The Lost Tomb 2.

Adapt from it's parent story The Mystic Nine, this The Mystic Nine Four Belong To Abelmoschus is also another side story from it.

Adapt from it's parent story The Mystic Nine, this The Mystic Nine Flowers Bloom In February is another side story from it.

Before watching this The Lost Tomb, it's better start from watching The Mystic Nine. Coz this The Lost Tomb it has all the characters from The Mystic Nine's (all nine surnames of families in The Mystic Nine) their descendants. This The Mystic Nine Tiger Bones Plum Blossom is from it's parent story The Mystic Nine one of the side story.

There are some characters in this The Lost Tomb 2 are somewhat related to Tomb Of The Sea. Especially “Hei Ye”.

It's the sequel or continuous story from the main story of The Lost Tomb and The Lost Tomb 2. And also from it's parent story The Mystic Nine.

Both dramas began airing at nearly the same time and both dramas have quite a lot of similarities. For one we have characters that lost family members and we have cases and people that have something to do with that. We have twisted characters that one, especially in watcher, can't declare as good or evil. Both dramas have very strong female leads . Also, both dramas leave you hanging at the edge of your seat, waiting anxiously what will happen next.

they both have that "do anything for specs" thing.. but Class of Lies is more focused on the students

Both deal about school bullying and crimes. In both dramas there is a declared teenager responsible for the crime, however both have more to the story than at first appears to be the case. Both dramas deal about adults that come into that school and with the help of the teachers learn what the school is truly made out of.
Both are quite similar in many aspects.