My copy's in storage, so I'm going off memory. Pretty sure there's the standard bonus manga with All Might, which is adorable. Then there's a page or two of 'character secrets' or silly Q&A where Horikoshi answers random questions about the characters' likes/dislikes. It's fluff, but it's the kind of fluff that builds out personalities. Like, finding out what All Might's favorite casual food is, or what Izuku does to relax. It's not a scene, but it's bonus character content.