Big Issue

1: fBoth drama are written by the same screenwriter '
Apart from the fact that one is build around politicians and their secrets, and the other about paparazzis and the things they discover, both dramas are extremely similar. From the character similarity of our male leads are nearly identical, both have a trauma from their past and both are at the bottom. Both meet women with a near identical character, and both women play an equal important part. although in Big Issue it is slightly more.
Definitely give the other a try if you like one of them.

Both female leads know more about the male leads than the male leads are aware.
It has so many similarities, apart from the fact that in My Mister we have someone quite broken whereas in Big Issue our female lead managed to rise form that and became someone quite strong.

Jang Joon Hyun is a talented and popular musician. He looks down upon the traditional trot music genre. Meanwhile, Choi Chun Hee works multiple jobs as the breadwinner to support her father and younger sister. Her mother was a trot singer and she inherited the voice, along with hopes of being a trot singer herself someday. A romantic relationship begins between these two individuals.

Rich female lead with her bodyguard/worker doing all the things for her. Both dramas are about action, thriller and crime. While Blood Free talks about business, medical, Big Issue is about journalism. Both have quite good chemistry between the main leads as well.

High school graduate Gong Xi gives up her chances for university in order to support her childhood friend and romantic goal, Bu Po Shang, in his pop idol career. Upon arriving in Taipei, Gong Xi starts working on multiple jobs in order to support Bu Po Shang, whose popularity quickly rises, eventually becoming one of the top idols in Taiwan. One day, Gong Xi catches Bu Po Shang flirting with his manager, and learns that he only used her so she can help him with his living expenses. Heart-broken and betrayed, Gong Xi vows to get revenge by becoming a bigger star than him. Gong Xi auditions for L.M.E., Bu Po Shang's rival talent agency, and joins L.M.E.'s new-found department "Love Me". At L.M.E., Gong Xi meets famous actor Dun Helian, who eventually falls in love with her. ~~ Adapted from the manga “Skip Beat!” by Nakamura Yoshiki

Pontifex Rembrary, a character known for his divine powers, gets transported to a new world while fighting a devil. He possesses the body of Woo Yeon Woo, a member of an unpopular idol group, and helps turn the group's fortunes around after a disastrous live performance. With his charisma and divine powers, he becomes popular among fans but faces challenges from his past, contending with strange religious groups and the devil.