[Klashikari]

No. Kengo was still wearing his Keiko-gi and Hakama. In fact, they put the scene in the cafeteria for some reason.
The weird part is that they made Kyousuke explains again the rules.

And I still think Masato was quite pissed off, considering the voice acting and how he expressed himself. The difference is obvious when you compare his reaction when Yuiko states that her katana may be a replica but it will hurt nevertheless: in the VN, he was "pumped" but in a very moody way, while in the anime, he was excited as if it was some cool stuff.
Also, in the VN, he asked if he could just pick the barrel with his fist and punch Yuiko with it: he meant business, he definitely wasn't having a fun time, except when he acted cool when he could parry Yuiko once.

What I also picked up though was that Yuiko was weirdly "enjoying" herself in the anime, swinging the katana erratically several times like a psychopath, whereas in the VN she basically made a flashstep, ignored Masato attacks twice, then did a single attack (parried by Masato), then a combo one (ignored by Masato as he was looking for the bluebeard) then went with the non weapon onslaught.