The main pair are an okay match, though the show tried too hard at the beginning to push the romance with some cliche cringy scenes like they suddenly starring at each other for no reason, which was totally unnecessary because they already had all the scenes needed for the Yeong Min and Ji Hyeon to organically realize their feelings with her classmate ghost's unresolved wish to spend time with her since she's his first love. Ji Hyeon being able to change outfits is a fun. The show really had a missed opportunity not using this ability for Yeong Min to get some gifts for his ghost mom when they finally get to spend some time together before she moves on.

I really didn't like how the show played up Yeong Min being molested by which ever spirits that randomly possesses the shaman for laughs. And they also didn't make it clear why the shaman invited Yeong Min to the haunted building the taxi drivers hired him to to solve even when Yeong Min asked him directly. I did like how he was finally directly useful in helping Yeong Min find out where his mom's spirit went.

They left the plot of Yeong Min needed to pay off a certain amount within a month in order for his house to not be put on sale. They could have just had a quick scene showing the gold he got as payment from the ghosts was enough to pay that off, but it's like they forgot about it even though it was an important set up that got him accepting that he can see ghosts fast. It's a distracting thing that his money issues that affect both him and his grandmother were never explicitly resolved still lingers when he doesn't do much work in order to date a dead girl.

Every kdrama with a ghost romance always ends up with the ghost being someone alive in a coma so it was not surprising at all and feels kind of like a cop out for less emotional complexity especially since it was revealed really early on. It's also a weird thing that I've seen in other kdramas too where if the girlfriend is older than the guy, they refuse to call her noona whereas when the it's the other way around, it's oppa for life.

Neither of the main characters, one of whom is an aspiring police officer and one who is already a police detective albeit supernaturally amnesic though retains her police training in all the other instances are particularly detailed in their planning in how the catch their cunning serial killer doctor Kyu Jin. The show is lazily keeping them exactly one step behind the serial killer in logic like how in the first two times they confront him, he gets away scott free even after directly trying to murder Yeong Min because they didn't do any sort of recording. Kyu Jin even gets his hand on Ji Hyeon's phone because Yeong Min is so careless with it. He learned nothing when he almost lost the phone to the goons a high schooler called to beat him up.

Yeong Min's friendship with the taxi drivers is nice, but I don't feel like they spend enough time together to really strengthen the emotional ties. Kyu Jin and Hee Yeon as well, there could have been a bit more of a connection other than murdering together to flesh out their twisted sibling bond. The serial killer set up with an emergency doctor who enjoys seeing the family of the victims think of him as a hero after he murders their loved ones is well set up though. Ji Hyeon's police veteran dad believed Yeong Min way too easily that Ji Heyon's spirit has been hanging out with Yeong Min no matter how helpful he has been to catching Kyu Jin. They could have spared a scene for that.