This is announced as a Sunday-at-the-end-of-August event at Nogizaka CACTUS, with Chieko_beauty clearly tied to the appearance. The title, price, and detailed timing are not recoverable here, but it is still being shared as a specific month-end gathering. The available evidence suggests a more personal, performer-led draw than a heavily advertised large event. More details would likely sharpen the picture.

ConceptA lightly detailed but clearly performer-led gathering at a small venue.