Watch Streaming Anime Online Free - English Subbed & Dubbed Episodes

I went to see the new Acchi Kocchi episode & after I clicked it, another tab opened up so I thought it was another ad site I could click out of. Then I notice that something is being downloaded & then my firewall says that it has detected a threat. It was a trojan so I quickly deleted.

Long story short, I almost got a trojan downloaded from an ad that appeared from an ad link on AU. Was this just a random coincidence? (first time it's happened on a site I trust so asking)...