ultimate kpop puzzle (not finished)

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Across
  1. 1. girl group formed from the TV show "idol school"
  2. 3. the month yeri joined red velvet
  3. 4. gidle's 5th title track
  4. 7. a kpop boy group with 9 members
  5. 8. "feel like a cinderella naega beonghae"
Down
  1. 2. girl group with 4 members
  2. 5. female soloist
  3. 6. group that disbanded on March 15, 2022