Nice twist. Looks like he knows about magical time travelling and necklace. Now I wonder how is it tied to Hinako as well, like would she become Hina in future and Hina become Hinako in the past.
The spotlights could've been limelight used during the mid 1800s, but that isn't the case due to the absence of pipes supplying oxygen and hydrogen and the rotating screw. The artist just probably made a mistake.
I'm more of a coffee person, but when my mom orders one I can't help but take a sip. Also, whats with this tea culture in just Europe, each country and provinces/states mostly have their own version of tea.