What to Watch After It's Okay Not To Be Okay

Another drama that focuses on mental health and wellbeing

It’s Okay, That’s Love with Jo In Sung and Gong Hyo Jin. It takes a deeper look at mental health since the FL and other leads are mental health professionals. The show covers various patients and presents their problems and treatment. Also, the FL and ML  also have mental health challenges of different degrees which is covered in the show. - u/muruku

It's Okay, That's Love deals with an almost similar issue .it has a bit more of a light hearted feel but still keeps the heavy subject matter. Highly recommend! - u/balderunnerdecker

It's Okay, That's Love - like IONTBO has mental health as a centre piece. The main leads are also working through their own issues themselves. Their relationship obstacles are different from the usual tropes like IONTBO. The way the story is told and the overall 'vibe' is different tho.  - u/SoofLast

It's Okay, That's Love: A wonderful drama that also tackles grappling with mental health and healing.  - u/parkbogeom

It’s Okay, That’s Love- tackles mental health, great romance line, heartfelt family of main characters all living together like in IONTBO - u/5soslol

Another drama with a focus on mental health and wellbeing

Give a try to "Fix You" Awesome acting, its about FL's  journey to heal and eps cases from psychiatry department in hospital. Its about mental health I think you enjoy it - u/Soubeli

Another drama featuring shared healing from past trauma

Thirty But Seventeen has a similar theme of two people who are healing together from a shared trauma when they were younger. No dark fantasy elements but great characters and acting.- u/JaniaAusten

Another Healing drama with a similar female lead

Angel's Last Mission : Love - Both shows have female leads with similar personalities, so I will recommend it based on that alone. Angel's Last Mission is fantasy, but healing is a very important part of the story, just like in It's Okay to Not be Okay.  - u/TotoroTheGreat

For similar dark fairytale vibes and female lead

Hotel Del Luna is a common recommendation. Even before the drama started airing, people were comparing HDL to IONTBO. This is mainly because the vibes that Seo Ye Ji's character gives is similar to IU's in Hotel Del Luna. They both have very outward personalities, are both gorgeous and have stunning wardrobe throughout the show. Both shows are quite different in terms of genre, but I would recommend it just for the visuals and the feel.  - u/TotoroTheGreat

Hotel De Luna - It's a completely different story and doesn't focus on mental illness but the overall dark Tim.Burton-esque vibe is there. And Jang Wan Mol, IU's character is a tamer version of Ko Mun Young - u/ethylredds

Hotel Del Luna! It’s another drama with a strong FL with a lot of fantasy/creepy elements - u/yuna1124

For similar vibes and a female lead who chases after the male lead

The Master’s Sun- Slightly dark and “creepy” like IONTBO, the FL chases after the ML in this drama too! - u/5soslol

For more strong brotherly bonds

My Mister: The thing that drew me into It's Okay to Not Be Okay was the strong bond between the brothers, Sang-tae and Gang-tae. I loved seeing their relationship flourish and develop over the course of the drama. If you're looking for another drama with a strong connection between brothers, I think My Mister might be a good pick. The male lead of this drama shares a strong connection with his two other brothers. It's fun to see all the trouble they get into, and how they pick each other up when they fall. The three of them look out for each other, and love each other unconditionally like how Sang-tae and Gang-tae do.  - u/eal8

Another outstanding Performance by Seo Ye Ji

Save Me: This isn't romance-centered unlike IOTNBO, but Seo Ye Ji gives an outstanding performance. It definitely has the suspense aspect though, as it deals with Korean cults that manage to draw people in and lock them up in the doctrine.  - u/parkbogeom

Another excellent drama starring Oh Jung Se with similar elements

When the Camellia Blooms! I feel like IOTNBO "vibes" are pretty much WtCB with Hotel del Luna aesthetics.

In WtCB we also have a charismatic, kind lead who struggles to enjoy her life to the fullest due to circumstances, in this case her child and being a single mother. Her relationship with her son is just as memorable as the Moon brothers. The drama is also shrouded by a murder mystery and sprinkles of comedy at just the right amount, just like IONTBO!

Oh Jung Se who plays our beloved Sang-tae is also part of the main cast and does an amazing job. We also have a very well written and very memorable character that I'm sure has been marked in the memory of everyone who loved WtCB, Choi Hyang-mi... - u/benevanuto

Another good drama starring Oh Jung Se

The OCN original drama 'Mistress' with Oh Jung Se (Moon Sang Tae of IOTNBO) as ML is a really good one. It is 19+ because of certain violent scenes but it's very well written and certainly has a chilling storyline. - u/motherofacat

To soothe your post drama blues

This will be like a soothing balm for your aching heart; it takes its time in telling the story, but the characters and the setting will just give you all the warm and fuzzies.

I’ll go to you When the Weather is Nice also deals with psychological traumas of the main leads. The characters are so real, the love story so delicate, and the atmosphere entirely too believable (in stark contrast to INOTBO’s fairy tale-esque depiction). Seo Kang Joon delivers a very nuanced and sensitive performance, and this is the first time I’ve liked Park Min Young without any reservations. Watching this made me miss winter so much, I can’t wait to rewatch it when it snows!  - u/dogemama