Recommendations

Both are gangster movies however New World is so much better..........................

Both shows feature boybands (one already famous and one that has yet to debut). They're both web dramas so they're short and sweet and the music is awesome as well!

This drama was written by Park Kyung-soo, the writer of Punch and Golden empire
Several actors of The Chaser are back in parts written by the same writer but in totally different positions and dynamics ..
Same tightly written and well-structured storyline, solid direction, and great cast members' acting skills

Chen Ling (??) and Chen Sheng (??) (both by Vic Chou) are twin brothers born out of wedlock, by a father who is their mother's brother-in-law, and has died in a racing incident. Their one childhood memory of their mother is that of a medicated cold bedbound woman, whose only words were that "in this world Sheng is the only one Ling can rely on and Ling is the only one Sheng can rely on".[1]

One day Ling meets Qi Luo, an introvert and a gentle girl, in a park where he asks her for directions. She draws the directions for Ling on the back of one of her stetches of a mother and child. Ling seeing her quietly drawing on a park bench reminds him of Sheng and becomes attracted to her. When Ling saves Qi Luo from being sexually harassed by their English teacher, she starts to open up to him. In exchange for the finished painting of 'Mother and Child', Ling promises to protect her.
Source: Wikipedia

Both "Love relationship" (drama) and "Enoshima Prism" (Movie) feature Honda Tsubasa, Fukushi Sota and Nomura Shuhei as the main characters. Even though time traveling is not a thing in the drama, the characters have the same relationship and personalities. Enoshima Prism could pretty much be a special to Love relationship.

Oh sweet young love is just filled with drama, heartache and swoon worthy moments! Both movies portray young love in a manner that makes one either want to experience it during their high school years or want to go back in time and experience it. It's a story of teenagers who experience love and heartbreak but it's also about discovering yourself and who you believe you are.

It has the same theme of being a manga original then adapted into a movie, both are also about life and music.

They are both based on horror/psychological thriller manga, both follow the idea of a hero or group of heroes trying to uncover and catch a mastermind who wants everyone dead, and despite the similarities, the stories vary greatly in many ways. Plus, Ousama Game is one movie instead of a series, so you won't be wasting much time if you happen not to like it!

Both of these dramas have very similar styles. It's both action packed and the main characters are both fighting to protect the people they love.

The acting of the casts were great. Worth to watch. Storyline is beautiful. One of the evidence to say that the acting was amazing will be the winner of Daesang 2015 of MBC: Ji Sung. Funny, Romantic and hot. FASTER WATCH IT......

Ji sung and Jung Eum are together again. U r definitely not going to regret to watch this drama. Trust me.

Male friends living and working together to succeed in life. Both dramas have normal cozy life which you can relate to. Riders is dealing with many typical Korean and probably many other countries' issues like how to find a good job and partner when there is pressure from parents and money trouble. Dramas about friendship and things in life which are truly important and meaningful. These dramas are not that serious as I made them sound like, there are many funny scenes as well.

Both happen in the late 80's and want to show how was life in that time

both main characters kill criminals but where both good and bad sides to killing the killers are explored

It's similar in terms of
- rich male m/c and poor female m/c
-male m/c falls in love first
-school setting