The anime adaptation only covered the first part of the manga series. While there is a lot of material in the manga that could potentially be adapted into another season, there haven't been any official announcements about a Season 2.
Where you can watch the existing season:
* Crunchyroll: This streaming platform offers a free version with ads, but you can also subscribe for ad-free access and additional features.
* Funimation: Another popular platform for anime, Funimation often has a free trial period available.
* Hulu: Some streaming services, like Hulu, may offer "Ouran High School Host Club" in their library.
Important Note: It's crucial to use reliable and legal streaming sources. Avoid websites offering "free" downloads or streaming, as they may contain malware or violate copyright laws.