Iyashi no Otonari-san ni wa Himitsu ga aru (2023)

Both stories touch topics of obsession and stalking.
But "Otonari-san" drama is much more dark (imo), so if you are into the psychological aspects of unhealthy obsession, but also romance then i reccomend watching this drama too!

- Both main characters are stalkers
- The FL of both shows develop feelings for the ML, despite the stalking thing
- Both ML are crazy
- You can sort of cheer for the stalker in the end, even if they are extremely weird.

Both MLs are very messed up with a dark secret and both FLs are cheerful and positive despite a hard life and MLs view them as the only bright thing in their lives. There is a SML who seems to have a crush on the FL and is very suspicious of the ML, viewing him as dangerous. Both are slightly disturbing romances with an unsettling feeling.

Both MLs met the FL during the lowest point of their lives and begin stalking/keeping track of her for a while after that before orchestrating a "meeting" between them. Despite everything, the two end up genuinely in love.

33-year old Han Je In is a mystery novelist who is notorious for habitual false reporting to the police in town. Her only friend is police officer Rok Hwan, who has had a crush on her since childhood. One day, Je In hears a scream of help from an apartment upstairs and reports that a serial killer lives above her but no one believes her. Convinced that Jason, the handsome man living upstairs, is a serial killer, she asks Rok Hwan to help follow him around with her. But as she learns more about Jason in her pursuit to uncover the truth, she begins to fall for him. Seeing her in this state, Rok Hwan feels a tinge of jealousy.

Both MLs are FLs' stalkers who then move in with her or next door to her and try to protect her from someone else in her life.

Sakuragi Shun is a salesman who works for a Sunbath Home Housing, a house manufacturing company. He enjoys a happy life at home with his wife and daughter. Due to a sudden personnel change, he was assigned to transfer to Kagoshima, a city he was familiar with from his junior high school days. There, for the first time in 17 years, he is reunited with his first love Takeda Hana. She works as a junior high school teacher, while her husband who works as first mate, spends most of the year at sea, so she usually lives alone. While reminiscing the bittersweet memories of their high school days together, a hidden Pandora's box begins to open...

Furthermore, sparks also fly with Katoyama Naoya, Shun's friend and former love rival from their junior high school days, who now works for another company in the same industry. Although Shun has a beloved wife, the flames of jealousy quietly flare up. Meanwhile, Sakuragi Shun's wife is trying to suppress her anxiety. Based on their phone calls and emails, she becomes suspicious that her husband is cheating on her, and in order to eliminate her fears, she takes a trip to visit him in Kagoshima. As the slight lies begin to pile up, the truth becomes complicated, and when the lies are exposed, how will the relationship between the four of them
change?