It's his real voice, you can hear him talking in English although just slightly in this BTS + cute baby (https://twitter.com/5051sm/status/1754845628562317461)
From their outfit HH (blue), HW (purple) it's seem that she cried on the night of ep 8.. (DH & SJ outfit also…
Their relationship at this point is not like dahye which is one sided. They both still have some feelings so they really should talk it through so that they won't regret.
Can't wait to watch...