There's a link to a longer version in the description. From what I can tell, its the same fight, just with more dialogue thrown in.
Boko was kind enough to leave a link to the whole script, even if it is in Japanese.
Running it through google translate, it's mostly the Witch taunting the guy, but she does explain that the kiss spell is her own creation and that it prevents anyone who looks at her with "naughty eyes" from harming her. She then goes on to explain that she can refresh the duration before it wears off, and that the hero is totally helpless unless he can clear his mind.