Doona!

A college student, Won-jun, becomes roommates with Doo-na, a retired K-pop idol who leaves behind her glamorous days.

Main

• Bae Suzy as Lee Doo-na

The main vocalist and center of the girl group Dream Sweet (Korean: 드림스윗; RR: Deurimseuwit), who announces her sudden retirement and stays in a share house in a college town.

• Yang Se-jong as Lee Won-jun

A college student and math genius who desires to live a normal life

Supporting

• Ha Young as Kim Jin-joo

Won-jun's high school crush.

• Kim Do-wan as Goo Jeong-hoon

Won-jun's housemate.

• Park Se-wan as Choi I-ra

Won jun's childhood friend.

• Kim Min-ho as Seo Yun-taek

Won-jun's housemate.

• Kim Sun-young as Doo-na's mother
• Kim Yoo-mi as the representative of Doo-na's agency
• Baek Ji-hye as Eun-joo

Special appearances

• Lee Jin-wook as Park In-wook, a person from Doo-na's past
• Kwon Han-sol as Song Tae-rim
• Go Ah-sung as Im Ha-yeon, a member of Dream Sweet
• Simeez and Rian of Lachica as members of Dream Sweet
• Kim Hyun-mok as stalker (ep.3)

Filming started around July 2022 and was completed on February 20, 2023.

On the review aggregator website Rotten Tomatoes, 83% of 6 critics' reviews are positive, with an average rating of 6.2/10.

Lee Min-ji of Newsen felt that "what stands out the most in this drama is the complexity of Lee Doo-na's character", describing her as "eccentric and outspoken, but also with a dark side", and appreciated Suzy's acting, who "played her complex sides with stability". Jeong Seung-min of MHN Sports appreciated how Suzy expressed the change that occurred in Doo-na after opening her heart to Won-jun and the chemistry between the lead actors, but also wrote that the series "can be childish" and "feels like a typical youth drama or a web drama depicting campus life". Choi Ha-na of TVDaily criticized the drama, stating that it has a predictable plot as it only focuses on the romance between Doo-na and Won-jun (while in the webtoon he is torn between her, I-ra, and Jin-joo) and the supporting characters have no function other than that of "bridesmaids" to the leads. However, she praised Suzy's acting, who "played every moment of Doo-na with just the right amount of intensity, never overdoing it or disappointing", considering it a good enough reason to watch the series. Journalist Kim Jun-mo of OhmyNews called it "boring" as "other than Suzy, the show lacks any memorable parts".

Joel Keller of Decider wrote that "Doona! is a pretty standard romantic K-drama in a lot of ways, but the added dynamic of a regular guy and a depressed K-pop star falling for each other makes things just a little more interesting". Joanne Soh gave the show 3 out of 5 stars in her review for The Straits Times, identifying Doo-na and Won-jun's chemistry, the cinematography, and the show's treatment of the protagonist's mental health issues as the show's strengths, but found it to be "oddly slow-moving" compared to the webtoon. For Geoffrey Bunting of Rolling Stone, Doona! "[weaves] a complicated yet relatable narrative about loss and love. On the surface, it feels at home with contemporary clichéd dramas yet represents a startling departure." He appreciated how it "builds a community around Lee Doo-na to pull her out of isolation and help her rediscover herself", and called it "a show that's really about letting go, shedding old lives, past loves, and former selves" that "deftly navigates the complexities of grief and, though wrapped in K-drama clichés, is surprisingly human". The series hit the No. 1 spot on Netflix's top 10 TV programs in Singapore.