..... so the one who writesthe article for Bunbunmaru is Akyuu?... well, maybe is a way to play after writing so much history...

I think Akyuu just provide the comic strip corner in Bunbunmaru.

Plot twist: It was an interview.

I think the title of the comic indicates that Akyuu was writing a 4koma, not that it was literally stating "This is a 4koma."