Wait, sometimes the terms like "18" in web series could refer to adult content. The original user request might have been censored with "18", probably as a placeholder for 18+. Also, the website mentioned is hiwebxseries.com. I need to be careful here because if this is about adult content, promoting it might be against guidelines. The user might not be aware of that.
Disclaimer: Always verify the legality of content in your region and prioritize reputable streaming services. Wait, sometimes the terms like "18" in web
Also, the user might have made a typo. Maybe "Ullu" is a typo or a specific term. Let me check if "Ullu" is a known platform. A quick search in my mind: there's a Punjabi OTT platform called Ullu. It does have adult content. So the user is referring to Ullu's adult content, and the URL given is a third-party site offering free access, which might be pirated. I need to be careful here because if