From Plushplush.sg here. 

In It’s Okay To Not Be Okay, Moon Gang-Tae (Kim Soo-Hyun) gives super stylish Ko Moon-Young (Seo Ye-Ji) a handmade nightmare catcher doll called Mang-Tae to help her deal with her bad dreams, and the adorably creepy plushie makes appearances in many, many scenes. 

Junghyuk and Seri candles from Korean candle label Soohyang, available from their website here. 

It's heart-fluttering. It's impossibly romantic. It's when Captain Ri (played by Hyun Bin) uses a scented candle ('cos she doesn't do normal candles) to look for Se-Ri (played by Son Ye-Jin) in a crowded market. It sounds a bit silly, but fans of the show will know it was a pivotal moment. Korean lifestyle brand Soohyang has an official collab with CLOY and made the Junghyuk Candle (in green) and Seri candle (in purple), inspired by the main characters. The LEELEE name is a variation of "RiRi", which is the moniker for the couple (Captain Ri and Se-Ri) coined by the show's fans. 

From allkpop the shop here. 

Protagonist Park Sae-ro-yi (played by Park Seo-Joon) opens a restaurant bar called DanBam in the Itaewon district, and its logo is immortalised in this neon sign, which is seen throughout the drama.

These aren't tied to any drama, but the bags with punny taglines do feature our fave oppas from our most cherished shows. Are you Team Gong Yoo ("I'm stuck Gong Yoo"), Team Lee Min Ho ("You Min Ho much to me") or Team Hyun Bin ("Where have Hyun Bin?")?

From local fashion label Sum of the Parts, here. 

From Lazada.sg here. 

It's a bit random, but while shopping, the female protagonist Eun-tak (played by Kim Go-eun) points to a soft toy and tells the Goblin (played by Gong Yoo) that it's him — a goblin who dresses up as a buckwheat jelly so that people won't be afraid of him. They end up buying the buckwheat toy, along with a red toy, and she sleeps with them and carries them around as symbols of their relationship. 

From various Carousell sellers. 

The cutesy soft toys first made an appearance in Ep 1 when they were given to Yoo Si-jin (played by Song Joong-ki) and Seo Dae-young (played by Jin Goo) by a shooting arcade owner for helping him. They act as the two guys' 'girlfriends' as they sit next to them in a coffee shop. Later, the toys make appearances in various scenes, including one where the wolf toy, which represents Yoo Si-jin, was given to Kang Mo Yeon (played by Song Hye Kyo). 

From Etsy here. 

Awww... those super-cute Dino matching family tees worn by Moon-young (Seo Ye-ji), Sang-tae (Oh Jung-se) and Gang-tae (Kim Soo-hyun), inspired by the child-like Sang-tae's great love for dinosaurs. Who else is a dino fan? 

From Etsy here. 

In Goblin, Eun-Tak and the Goblin magically travel to Canada, where she sees a necklace she likes at a streetside store. It says "Destin", French for destiny, which is of course one of the big themes of the show. He secretly buys it and gives it to her, and she piognantly wears it in several scenes.   

Another one that isn't from a drama, but which features one of our fave oppas, Park Seo Joon (of Itaewon Class and What's Wrong With Secretary Kim?, among others) on a face mask. Yes, his beautiful face is partially covered, but it's all kinda cool.

From Etsy here.  

From Shopee here. 

In this hilarious romcom, Park Seo Joon's narcissistic chaebol character Lee Young-joon gives his secretary Kim Mi-so (played by Park Min-young) a giant plush cow to reward her for being a "as hardworking as a cow". Wah, so romantic. Lol. 

From Shopee here. 

In one of the most memorable and fun yet sad scenes from Crash Landing (actually, aren't all the scenes kinda like that?), the guys try to celebrate Se-Ri birthday with a surprise party, and get her a cake and this penguin wearing a blue hat, held by the hilarious Pyo Chi Su (played by Yang Kyung-won). It's super random, yet strangely poignant and cute.