>>532225949
Sakura is not the same as Naoto in muscle mass but the point is presentation, all characters (except Hina who got to know Sakura more) thought Sakura was a man.
And even if Naoto wasn't considered a twink, Kanji would still love her the same, considering he also thinks Akihiko, a really big buff dude that walks shirtless 24/7, hot.