I really appreciate you sharing this, but it looks so compressed and downscaled, is this the real raw? Is the korean version linked below just upscaled and with compression artifacts filtered out?
it's only the public version, so the resolution is low. Higher-resolution version requires a subscription.
The Korean version is also marked "通常版 (i.e. public version)", so its high resolution is likely to have been manually upscaled by the sharer (or its source).