I have dropped several Japanese dramas adapted from Japanese mangas because they are not well-executed for drama viewers like me who are not manga lovers, but this one is an exception! I have read several reviews and comments before watching this, I think after they watch more manga live-actions they will change their mind. The actors/actresses acting and the script came out of manga but with good directing and editing it becomes a cute light romcom watchable for non-manga lovers.

LIKE:
(+) Just reinstated above: well-adapted Japanese manga, good directing, good editing
(+) A fast paced drama great for binge-watching: 8 episodes x 25 minutes, so about 3 1/2 hours.
(+) Although some conversation seems unimportant, but connect with next scenes or the development of the story as a whole. So no scene skipping necessary.
(+) As light as it is, this drama teaches you a great lesson
(+) If you never read the manga: a turn the table twist in the middle and a surprise in the last episode
(+) Cute doll-san!
(+) The actors and actresses are not newcomers here and had played in several dramas and films prior. Their acting here were good and just out of the manga.
(+) Great acting of both actor Takasugi Mahiro as the pricky and picky Takane and actress Takeuchi Aisa as the spunky Hana. Their chemistry is so cute and natural as a huge age-gap couple.
(+) What to say... Ito Asahi is an eye candy Luciano
(+) Funny grandpa! Actor Shinagawa Toru is 83 years old and still acting!

DISLIKE:
(-) Only one, not sure but it can be a positive for the drama. Actor Takasugi Mahiro was only 22 but played as a 26-year old man. Despite of his good acting, he looks too young for the Takane character. As I said, this can be good to narrow the age gap as this is a youth drama anyways.

As I read in the comment that the manga was still ongoing, I don't mind to watch a second season of this drama if the story is still cute and the adaptation is well executed. But I think the end is as good as it is.