As a drama, it covers the basic premise of romance developments, while also discussing more pairs and several topics that pertain to Japanese people. Specifically "de facto marriage" relationship (living together but not actually married), same-gender relationships, and other more general subjects. But the core is the main couple, and the evolution of their complicated arrangement.
I actually quite enjoyed it, but mostly because the drama revolves more around the character of "Mikuri". A very cute and approachable young lady, with a logical approach to things, while still being emotionally pushy. Certainly a journey to get to know her, and one I'm glad I went through. Aragaki-san is one of my favorite actresses , and is beyond delightful for her to do such a role! Mikuri's side of the family is just as appealing.
Gen Hoshino is definitely a talented singer and does well in his role as the cherry-boy, but his character is far from likeable a lot of the time. But, is this contrast that allowed the character of Mikuri to develop the way it does. Some other characters are well defined, but equally awkward. Still, everyone delivers with ample charisma and help build a world you'd be happy to be a part of.
Series has good production and very energetic segments that contrast well with the seriousness at times. And while not completely predictable, it rarely goes anywhere unexpected. But it keeps a joyful atmosphere and I laughed quite a bit. Would definitely recommend, because it is well written.. and the execution couldn't be better!! There's a movie, for anyone interested.. one that is even more serious still, and deals with the Pandemic and it's problems. As the series itself, all interesting content, educational and a different point of view to consider.