Recommendations

Strong Leads with a POWERFUL LOVE triangle Tale.
TOP NOTCH actors who pull off the shades of grey in character, relationships and romance.

One Sunny Day "OSD" gives the same light heart-fluttering vibes with 2 strangers having to spend a few days together on Jeju Island and unexpectedly find themselves to be attracted to each other at parting, being tentative of their new feelings, and longing after sorting out their emotions. OSD has the added bonus of several scenic sites on Jeju Island as backdrop.

Story plot is almost the same. Time travelled thru a pothole of water. Main couple in both dramas ended up together in the modern times.
Both dramas are definitely must watch.

Rai Rissaya is similar to Poisonous Passion :
-Weal femal lead
-Femal lead murder
-Femal lead survives and becomes stronger
-Femal lead takes revenge

Older Woman/Younger Man, Male Chases Female First, Healthy Mains’ Relationship, Nice Male Lead, Slow Burn Romance, Independent Female Lead, Slow Burn Story, Smart Female Lead, Mother-Daughter Relationship, Family Pressure.

similar cast and similar themes of where they cook food and provided hospitality towards foreigners. and is also made by the same producer.

similar cast and similar themes of where they cook food and provided hospitality towards foreigners. an is also made by the same producer.

Both male leads are in contact with someone from the past and exchange pieces of information with each other through a specific machine. The big difference between these two is that they have completely different genres. Signal has little to no romance and focuses more on mystery suspense and crime while ditto focuses more on romance. Signal IMO is an outstanding drama, please do watch it if you have time.

Both are Japanese movies set in high school. The MLs have never had girlfriends before, and fall for the FL who is crushing on her teacher. Both FLs ultimately choose the ML after a dramatic scene in which they chase after their teachers, confess their past love, and decide to move on with the MLs who they've fallen for.

Both MLs are shy and introverted with a long time crush on the FL. Both MLs work as actors in some way.

Both are about childhood friends who reunite. Both MLs fall long before the FL, and chase her. Both MLs become strive to become famous (actor vs. singer) for the sake of the FL.

Both MLs are very introverted, FLs are more extroverted. The main couple were childhood friends who separated, then reunite at high school, and both MLs have long had a crush on the FL and will do anything for her.

King and Burger's story is similar to Ida and Aoki. King sees a drawing of him on Burger's book, and thinks Burger likes him. But the book belonged to Burger's friend- Ink, who had a crush over King. Burger ends up tearing that page and immediately eating it to escape the situation and decides not to let out his friend's secret. Thinking that it was Burger's drawing, King starts reciprocating Burger's feelings and starts flirting with him.

Both dramas have the same actress as the leading lady.
Lu Wan Wan is a sophomore student in the Clinical Department of Tsingyao University School of Medicine. After getting drunk, she got into a scandal with Ren Chu, a bright student at the same school. To curb the raging scandal, the two agreed to a strategy to eliminate the gossip. In the process, they discover each other's shining points and gradually develop a good impression of each other. With the help and guidance of Ren Chu, Lu Wan Wan overcame her timid personality and strived to become a qualified medical student. Unconsciously, the two influenced each other and became their better selves.

Both of these BL dramas follow a lead with trauma, who is gun-shy/reluctant to enter into a new relationship. As part of the trauma, the lead presents a fear of the dark and a lot of insecurity. Both dramas also have a nice push-and-pull flirtatious dynamic between the two romantic leads, as well as the beginnings of a romance plot between their coworkers.