Tekuteku: Toukaidou Nukemairi

In the Edo Period, two kids set out on the Tokaido Highway from Edo, without the permission of their parents or masters. Although their goal is the Ise Shrine, they also want to just travel around the country... A girl, Ichi, and a boy, Juu, travel along the Tokaido Highway to find their father in Ise.

(Source: LEED, translated)

Note: There are additional chapters not included in the volumes because the volume releases were canceled.