Sonic Channel staff on their blog:
It is Vector dressed in Japanese clothing performing mamemaki!
Speaking of the event of February, it’s Setsubun!
The Japanese clothing of the bossy Vector is manly, isn’t it? He, who has strong physical strength, would probably expel many demons for us~!
I think it was a little difficult this time but wonder if the big mouth has become the hint. And most people answered “Setsubun” or “mamemaki.” The square wooden box with lots of beans and the traditional event that we will carry out next month seemed to be the hints, didn’t they?