Question 1

Where is Greenhouse?

Accepted Answer

Greenhouse is in Toyohashi, Aichi Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Makeine: Too Many Losing Heroines! does Greenhouse appear in?

Accepted Answer

Greenhouse appears in EP12 of Makeine: Too Many Losing Heroines!.

Question 3

Can I visit Greenhouse?

Accepted Answer

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

Question 4

Where was Makeine: Too Many Losing Heroines! filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Greenhouse is one of those real places (EP12).