FL also travelled from modern world into a fictional world
In both drama, the original plot has ML disliking the FL and is a requirement for FL to change this by making ML fall in love with her. The task is a tall order but the only way to survive and return to her own world.

Same fantasy romance genre. Both FL travels back in time to their high school period to save ML. Both ML dies by suicide.

If you enjoy Hard to Find, you will like Butterflied Lover. Give it a watch while waiting for new episodes. Zhao Yi Qin is enigmatic and charismatic in both roles. Both dramas are of darker tones. Although shorter length but great production value, gorgeous cinematography and most importantly a grippling plot.

Both FL is a coroner in ancient China. Intelligent in uncovering cause of death. Both FL become instrumental in helping ML solve cases. Both ML have a magistrate type of post. Both ML are intelliegent, well respected and feared by many

Face-swapped female lead. And male lead drawn to and falling for the same person twice. Conspiracies and mysteries waiting to be uncovered.

Also based on a novel by the same author Gu Man.

Boss & me also hav minor references to Gaming. However do note the dynamics and screenwriter is different. Some changes to the novel. Theres also interference from 2FL which was annoying to say the least.

Modern girl travels to the past. Meets the emperor/king.
Both is a short story. With convincing actors and delivers on the emotions.

I thought of Flourish in Time while watching Summer again. Theres some similar vibes. Not just high school setting. The use of flashback when ML and FL leads were kids and FL is fiercely protective of ML.. and the kids version are real cute. FL is her most honest version with ML. Then theres d deskmates. FL became bestie with her deskmate. Friendship. School mates. First love.

Members of opposite sex who starts off as strangers and come together under 1 roof to see if theirs sparks/interest to develop to something more.

Reality show with young adults who are strangers living together under one roof. They spend time together. Go on dates while getting to know each other.

Similarly a father upon facing issues with health takes upon himself to intervene in his children's lives. Teaching them the importance of family and embracing life.

Both ML pretends to be weaker in front of a known villain. At court, they are unable to compete and win against the opponent who had stronger political influence and wields alot of power influencing the emperor. In actuality, ML is a planner, careful and skilled in martial arts

Maiden holmes in many ways felt like a shorter, thinner and simpler version of Under the power. With crime solving and cases as the forefront of the drama and the darker part on FL's tragic family death.