Series: Little ones go around (omukkuri)

Source: https://www.pixiv.net/en/artworks/102092417
Original title: おちびは巡る

Koyukkuri sisters tell that parents that they want to go independent. Their delusional parents believe that they really are capable of going independent despite still being children because they've inherited their amazing pastes, and so let them go.

And then the koyukkuri's plan after going independent is to use their """easiness""" to get adopted as pet yukkuris. It went as successful as you expect it to be.