Kasei-Theory is a non-modal structural framework whose constitutive core is not determined by its application to external domains. Earlier formulations combined this Application Non-Constitution with stronger commitments to non-applicability and non-transfer, effectively leaving no articulated route to externally answerable application. This paper argues that the stronger inference does not follow. A framework may remain non-constituted by its applications, and its configurations may remain non-transferable between domains, while constraint-preserving external application is nevertheless possible. External application is defined as a defeasible research construction in which a source-side role, reconstructible through its constitutive constraints, is used within a specified target problem, scope, and analytic purpose. The resulting analysis must remain answerable to target-side considerations whose warrant is not exhausted by the source framework. The paper accordingly distinguishes interface contact, external application, downstream analytical propagation, comparative distinctiveness, and pressure directed back toward the core. A case concerning large-language-model understanding, historically developed from Anti-Semantics rather than from an application of Kasei-Theory, is reconstructed as a failure-capable stress test rather than treated as prior evidence of successful application. The resulting account revises the earlier closure around non-applicability while preserving the non-modal constitution and non-transfer commitments of Kasei-Theory. ( direct link )