Verifiable from public search results: the handle @muchoplaser, the styling Plasér, the street Calle Cuna in Seville, the hole-in-the-wall service format, the prominence of pistachio matcha in visitor posts, and a pre-opening announcement targeting late September to early October. These points repeat across multiple independent posts.
Not verifiable from the available record: the legal name of the operating company, the people behind it, the exact opening date and year, current opening hours, prices, and whether the window still operates in the form described. This site does not guess at any of these. Absence of evidence is stated as absence, nothing more.