This appears to be the primary scanlation group translating the series. You can check their official site or their reader for the latest updates on "Unreachable Girl."
It looks like you're searching for of the manga/manhwa " Unreachable Girl " (also known as Unattainable Girl ) in Spanish. This appears to be the primary scanlation group
If you can't find Chapter 29 yet, it may be because the translation is still in progress or the series is on a brief hiatus. These "Raw" chapters usually come out in Korean or Japanese first before the Spanish "Dragon Scan" version is released. This appears to be the primary scanlation group