Although Kazoku Ni Narouyo was published before Itsuka Koi Ni Naru Made, its better to read the one from highschool, cause obviously you'll understand more by reading this one, but also get a better insight on the whole situation with Tomoe
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Itadakimasu, Gochisou-sama