It’s the new release of the Japanese stationery youtuber Seasar. It looks like a hybrid between the Staedtler hexagonal and a kaweco special, I think it looks quite nice. It’s made of aluminium covered by neorabasan (the same material as the cover of zoom L2 I think) and the internals seem quite well made, including a rubber ring to avoid rattle when writing. I definitely like this design better than the aero.
Since he’s incredibly popular among kids in Japan I can imagine this will sell out in minutes, and resell in mercari for double the price, so its gonna be quite annoying to get for a while. But he plans on making a few thousands each month and hopes for stock to always be available.
The price is 6600 yen