Both have an orphan ML with abandonment issues and terminall illness with a love story.

The scars of the ML of Mr Plankton has brought back memories of the poor traumatized ML of the Classic old kdrama I'm Sorry I Love You, both are messes.

Both deal with traumatized characters and show realistic flawed humans, similar quirky vibes. Both are deep dramas.

Theme in both dramas is INTERCULTURAL DATING,

ML & FL are from different countries.

In WCAL it's South. Korea and Japan,
it's a modern realistic setting.

In FJS it's Thailand and a made up fictional country, set in fictional historical desert setting with different kingdoms.

Both are 20th century historical korean dramas, with a setting/theme of theater as central part of plot.

Musical theatre/Theatre a central part of plot in both.

Even the actress (Kim Yoon Hye) is playing a side character in both.

I think anyone into theatre or musicals could enjoy both.

Both dramas have one lead character who runs a hotel set in the middle of of nowhere inside a forest

Both have leads that knew each other in childhood/youth and and meet again as adults in a romance.
In both the FL returns to her hometown, where she meets the ML again.

Good casting in both too!

Both are Timetravel-Mystery Romance dramas,
similar serious melo mood, but not too heavy.

Adult romances.

The Atypical Family also has the psychological genre too, while My Deepest Dream is more mystery-romance.

Beautiful athmospheres and directing in both.

Both have two traumatized leads with emotional scars healing and coming together in a very realistic way.
Both are romance dramas for older audience, with leads in 30s and realistic romance.
Both have great writing.

Both a
Mature realistic romance between 30+ leads, athmospheric, beautiful directing.

Both have leads that do very natural acting.
Both released in may 2024.

Both are same genre of slice of life, melodrama, romance.

Beautifully shot, athmospheric mature realistic romances between leads that are 30+ of age. Both have really good actors as leads with acting skill.

Healing and relaxing mood,
both about a romance between a woman and man in 30s.

Beautiful landscape shots, scenery that only enhances the healing vibe.