I prefer the way her calling him 'young man' like the Danbooru translation does. Calling him 'shounen' seems less understandable for someone not already familiar with this quirk of hers.
FYI, this series is way more advanced on Danbooru, translated too. Gamer gyaru is in the lead at 53~% and the one is about 45%. No real progression from the other two yet.
She's already lost to him before, this will just be a repeat. She doesn't even want to win, she wants him to make her lose again; the only one who can.