Define "needed". Mangadex as a whole can't decide if the shouta tag means an age gap romance, a certain style of character, or just having a goddamn kid who's a boy in the series. That tag is gibberish at this point. (Personally I'd find it absurd to have it here, for this series, but how divergent people's opinions are regarding what the tag means is precisely my point. And last I checked staff's official stance was "it doesn't have a specific meaning")
(Honestly I think using terms rooted in well-known slang for pedophilia as tags for anything but just that is, frankly, piss-poor taste... but my fellow weebs are often in denial about that bit, so what can you do.)