Isa-ssi

Koo Yeonjun is never meet Jun Hee or fall in love to Junhee since the very beginning. After his accident with Tae Ha in 2007, Yeonjun is died and his body is empty. Who lives in Koo Yeonjun's body in 2007 is Siheon from 2002. So, Siheon got coma in 2002 and his soul went time travel to Yeonjun's body in 2007.
And for your statement, "Koo and Jun might never become a couple." It's true. Yeonjun and Junhee never be a couple. Yeonjun never meet Junhee. The one who greet Junhee in the bus in the ending of episode 12 is Nam Siheon, not Koo Yeonjun.
But I think your statement that "Koo might never had the car accident" is wrong. Because, the original Yeonjun accident is not related to any of time traveling plot. Even if Junhee never back to 1998, Yeonjun is still goes to accident. The only difference is, after the accident, his soul will left his body and there's no Siheon will got inside Yeonjun's body so we can assume, without time traveler, Yeonjun will died with Tae Ha in the accident.
I don't get with "The body switching of Young / Hee doesnt' make sense." Who is Young and who is Hee?

Which part make you confused? Maybe I can help. So, about Nam Si Heon's time travel ... in 2002 the original Nam Si Heon got into traffic accident after he visit In Gyu in jail. And his soul woke up in Koo Yeon Jun's body in 2007.

In the end is definitely Siheon because the original Yeonjun never meet Minju. Btw, when Junhee got into Minju body, she can remember Minju's memory but why Siheon can remember Yeonjun's memory?

Just continue to watch. All your questions will find the answers gradually.

Actually, at first, I got confused too because the child actress who act as young Junhee is only 9 but she looks like 5 haha

I think he still got in the traffic accident with Tae Ha. Because his original story is not crossing path with Siheon and Junhee at all. At least without time travel, we know that Junhee and Siheon ever met in 1998 when Junhee still 11 y.o. But no one ever meet the real Yeon Jun.

In 2007, the real Koo Yeonjun (the gay one) was getting a traffic accident and went into coma. When he's awake, it's not Yeonjun at all, but Nam Siheon who got a traffic accident in 2002. That Siheon looking for Han Junhee and eventually they felt in love. So, from the start is only Nam Si Heon and Han Jun Hee. There's never Yeonjun and Junhee.

Please do! It's best drama of 2023 for me

It's already air on Disney+

Yesss! I want to see Woo Joo goes furious and say to her family that she wants happiness ALONE. After all this time she never really put herself first, and when she has something that give her happiness, their family ask her to let it go, even without considering her feeling.

And I just don't understand why Hye Seong feels betrayed because Woo Joo and Jun don't share the secret with her. I mean, have you ever been there for them? Hye Seong is always too busy seek for love. That's why Woo Joo spend most of her time with Jun. Don't ask for other people trust if you never present from the first place. And btw I hate Sunwoo too for tell Dong Jin and don't wait for Woo Joo to tell it personally.

Hahaha yesss! I am so relieving there's no love triangle. At first, I thought it will be a love triangle between the ML, FL, and Jun or Min Young. But it turns out Jun is purely just a brother figure for Woo Joo and Min Young is not as bad as I thought.

I actually understand why she slaps Woo Joo. It because she thought Woo Joo dating a married man. I will slap my sister too if she's done that. But what make me furious is even after knowing the fact, she never tried to understand Woo Joo a little bit.

It hurt me the most because Woo Joo is don't fight back for her will. She just obey what her family ask. How much more she must sacrifice for her family? First the university, now she must let go of her love. And still no one in the family tried to understand her. I want Woo Joo to be more selfish because she deserved it. After everything she's been through, she deserves happiness more than any other people in the drama.

Yasshhh! I feel so hurt when I saw no one on Woo Joo's side (except Jun). Woo Joo did the revenge for the family, and now, when she got the fruit of her revenge, all of the family member blame her. Why you don't try to understand her feeling first?

I got your point. And yes, I hate her to for jealous with her little sister. I actually always try to understand her. I understand how Woo Joo and Hye Seong have different approach about how to deal with the grief of losing their father. Hye Seong seek love from other people, that's why she can't remain single for the long time, meanwhile Woo Joo try too hard to be the superhero in her family and fill the big sister role, which was never filled by Hye Seong. All this time, Woo Joo always tried to understand Hye Seong, but now, for this one time, instead of trying to understand her little sister's feeling, Hye Seong rather feel jealous and playing victim of 'why-no-one-trust-me'. Did she ever think that how could Woo Joo believes in her if she was never present?

Open the forum this morning and found how everyone hates Hye Seong. While watching the episodes I was trying to understand Hye Seong point of view but it's too hard. And same with other people, I hate her the most, maybe more than I hate Dong Jin's eomoni. I hate how she always act carefree all this time and now try to act like a best older sister in the world. It's too late, Hye Seong. But for me, the highlight of last night episodes was how no one in the family tried to understand Woo Joo's feeling. It must be hard for her, and the only one person who tried to understand her is Jun, while she took the revenge for her family in the first place. All this time I thought Jun had a feeling toward Woo Joo, that's why he is so protective. But now I understand, he just doesn't want Woo Joo falling deeper towards Dong Jin because he knows, in the end their relationship won't go well and he knows Woo Joo already suffering for this past years.

Mereka cocok kok. Kocak juga tingkahnya. Aku malah nggak pernah dengerin lagunya Treasure kecuali Darari di reels orang orang, tapi ternyata cukup enjoy nonton tingkah absurd mereka berdua.

I love the original one so much, and after read your comment I decide not to watch the remake one because I just don't want to ruin my image of Si Tu Mo and Gu Wei Yi

I always hoping Huangfu will get mature over time, but this case is beyond expectation. I think Huangfu will become mature because her relationship with ZY, but losing her mom ... I can't even think about it. I am crying my eyes out. Btw I just love ZY even more. Is he exist in the real world?