@Variousletters I was about to say the same thing. Tsuda and Hagimura are supposed to be 2nd years at this point in time, and the other 2 3rd years. I was figuring this would end by the time Shino and Aria graduated, but I guess that isn't happening anytime soon.
@nachtness it's more than 500 chapters long and it's a 4-koma; I think it's meant to be read like you read a newspaper and not like how you read a good manga with a story. People probably skip chapters a lot.
Not like it even needed to - Shino and Aria would probably constantly show up (like Furuya does). Only difference might be they're no longer wearing uniforms!