Question 1

Where is Gakko Bridge?

Accepted Answer

Gakko Bridge is in Gujo, Gifu, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Botan Kamiina Fully Blossoms When Drunk does Gakko Bridge appear in?

Accepted Answer

Gakko Bridge appears in ED3 of Botan Kamiina Fully Blossoms When Drunk.

Question 3

Can I visit Gakko Bridge?

Accepted Answer

Yes. Gakko Bridge is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Botan Kamiina Fully Blossoms When Drunk filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Gakko Bridge is one of those real places (ED3).