Recommendations

HC 2 is the sequel of HC. The story in the sequel is really the continuation of the FL’s life and career. Expect to get the similar vibes and enjoyment with lots of laugh!

I looked through recommendations and cant agree with many of them.
I think not only period drama and time travelling ones should be recommend, but show with similar mood.
So, close to this drama is the Rooftop Prince.
Both are funny, still different. Both have time travel, including mix period and modern.
I would say that humor in My Only Song is close to Waikiki, but the Rooftop Prince is just regular drama with regular plot and with lot of funny moments. In My Only Love Song plot is not the base of drama, the humor style is the base.

A girl is kidnapped and held captive

Same stories

The FML coerces the man her female "sister" likes into marrying her in order to plot revenge against her aunt for taking over her family's company.

it gives me the same vibes, past lovers that reunite, a story about love and fate, I don't wan to give away more and spoil the movie

The main character is misunderstood, similar to the one in New Smiling Proud Wanderer. Similarly, both main characters question whether good people are as good as they seem and are bad people really bad. They come to the concept of a grey area where there isn't inherently absolute good or bad. They both try to follow unconventional ways of fighting. They both go through betrayal and trauma and eventually get stronger and try to fight their way through.

I saw many people saying how the lead characters in Love For Love's Sake are similar/remind them of the ones in Weak Hero Class 1, just in a different universe.

Both titles come from Japan and deal with the theme of (early) teenage love between two people of the same gender in a conservative society and the tragic consequences it can have.

Unlike Monster, Chul Soo is just a short movie with a low budget but both movies are about developing romantic feelings for somebody of the same gender during early teenage years and the pain it can cause to the involved.

SimilarGenres:
Thriller, Mystery,

Similar points:
Adapted From A Novel, Detective Fiction, Detective Male Lead, Smart Male Lead, Scholar Male Lead, Investigation

A love story unfolds about 7 people, including Kume Masakazu. They are in their 30's, live in Tokyo, and have their own views on love and friendship. Kume Masakazu is single and 33-years-old. He works as a struggling screenwriter. He doesn't have a girlfriend, because he has decided to cut off contact with a woman after meeting them 3 times. Because of his tendency to run away from love, his friends call him the "Man Without Love."

A love story unfolds about 7 people, including Kume Masakazu. They are in their 30's, live in Tokyo, and have their own views on love and friendship. Kume Masakazu is single and 33-years-old. He works as a struggling screenwriter. He doesn't have a girlfriend, because he has decided to cut off contact with a woman after meeting them 3 times. Because of his tendency to run away from love, his friends call him the "Man Without Love."

A love story unfolds about 7 people, including Kume Masakazu. They are in their 30's, live in Tokyo, and have their own views on love and friendship. Kume Masakazu is single and 33-years-old. He works as a struggling screenwriter. He doesn't have a girlfriend, because he has decided to cut off contact with a woman after meeting them 3 times. Because of his tendency to run away from love, his friends call him the "Man Without Love."

A love story unfolds about 7 people, including Kume Masakazu. They are in their 30's, live in Tokyo, and have their own views on love and friendship. Kume Masakazu is single and 33-years-old. He works as a struggling screenwriter. He doesn't have a girlfriend, because he has decided to cut off contact with a woman after meeting them 3 times. Because of his tendency to run away from love, his friends call him the "Man Without Love."