Nobody's trying to tell a story here. Three episodes of pure sketch comedy built on the absurdity of mecha girls doing mundane things in chibi form, where the joke lands harder because it's operating at full speed with zero setup tax. The humor lives in the immediate moment, not character arcs or payoffs. This is what happens when a comedy decides it only has three minutes per episode to make you laugh, so it commits entirely to weird energy over coherence. For viewers who want to turn their brain completely off and just watch cute robots be ridiculous, this is frictionless. The lightness isn't a bug, it's the whole point.
Robot Girls Z Petit Chara Short Anime is a set of three special episodes released in 2019 as a companion to Robot Girls NEO. The shorts are billed as comedy, so expect lighthearted, joke-driven installments rather than a full standalone story. With only three episodes, the whole set is a brief extra for viewers who already know the main series.