the end seemed appropriate to me since little by little, the loose ends that the story left in itself were not so important, but it was left aside to be able to concentrate on the protagonist and on her facets from start to finish, although she could getting along better, he ran well, slowly but surely, in addition, the manga is of a calm nature, no sex or anything edgy today, that is why it is very well done for what it was intended to be, so that good.
tachibana is interesting and if your resolution is not what everyone expected since they expected a kiss or something, I expected something like this, as for kondo, he knew very well his position in those matters of his life, his work and his son, and his effort to be a writer, so we just watched his growth as an inspiration for her to realize that she was only running away from the challenge of running once more, when acting more like a way of pushing helped her so , she ran again, and leaves implicit that she is in love with the memory of him more than his person, since he tried last to stop clinging to him in order to pursue his goals once more.
I will give it a 7/10 on my personal scale since if I liked the art a lot, it may take a long time to make the intentions clear but it is better built than other things I have read.