How can I verify the legality of a website offering free 'love story comics pdf' downloads?

Look for clear copyright statements or disclaimers on the website. Reputable sites will explicitly state that the comics are in the public domain or that they have permission from the copyright holder. Be wary of sites with vague or missing information, as they may be distributing copyrighted material illegally. A good rule is: if it seems too good to be true, it probably is.