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Artist's commentary
GuP Kindergarten Returns! Story 320－Sandbox Continued, Finale
Source: https://twitter.com/s4_black/status/1488715605008334848
English:
The teacher came. The teacher explained that neither Marie-chan nor Chiyomi-chan were at fault. Then she instructed them to return the sandbox tools. Because we are going to go buy sandbox tools for Chiyomi.
Source: https://twitter.com/s4_black/status/1488716174427029505