Except from being a BL, everything else is similar:
- city person moves to small village/town
- adjusting to country life
- village beau/chief that's respected by everyone as the love interest
- self discovery
- interacting with locals and children, and integrating into community
- goes back to city/original home
- slow burn romance
- masculine ML
- grand return at the end, and happy ever after
- death as inciting incident to leave former life behind for a change of scenery

the parallels go on forever! just that ATTS is BL and Meet Yourself is het.

there's no age gap in IOTNBO but in both dramas:
- the FL is rich (and has a great wardrobe) + has been sheltered (personalities differ though)
- FL pursues ML first and relentlessly chases after him
- has a ML who has things holding him back from starting a relationship with FL (in TFF its age gap and his responsibility as an adult, in IOTNBO its his responsibilities and her personality).
- both have great chemistry between leads
other than that plot varies wildly, but I think it's a good rec to keep in mind if you run out of directly similar ones.