Going on a Long Sea with a Ship and Actually Getting the Golden Eye of the Sea

Orphan Yu Chao works as a boatman just to earn tuition, but unexpectedly gains a golden eye that can see through the seabed.

From then on, the mode of purchasing goods from sea was started.

Oh, sea, you are so big. Oh, seafood, you are so expensive.

Goldfinger (not particularly exaggerated) + single female protagonist (male protagonist has a partner) + hardworking daily life (some prices may be slightly exaggerated compared to reality)