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YSI Study - YSI Academy Speech Contest (April 25, 2024) - Group C
YSI Study - YSI Academy Speech Contest (April 25, 2024) - Group B
YSI Study - YSI Academy Speech Contest (April 25, 2024) - Group A
YSI Study - YSI Academy Speech Contest (November 30, 2023) - Group D
YSI Study - YSI Academy Speech Contest (November 30, 2023) - Group C
YSI Study - YSI Academy Speech Contest (November 30, 2023) - Group B
YSI Study - YSI Academy Speech Contest (November 30, 2023) - Group A
YSI Study - YSI Academy Speech Contest (April 27, 2023) - Group C
YSI Study - YSI Academy Speech Contest (April 27, 2023) - Group B
YSI Study - YSI Academy Speech Contest (April 27, 2023) - Group A
YSI Study - Speech Contes 영상 - Group C
YSI Study - Speech Contes 영상 - Group B
YSI Study - Speech Contes 영상 - Group A
YSI 갤러리 - YSI Speech Contest (November 24, 2021)- Group B
