Style reminds me a bit of Goto-P?

How is that a question?

I really need sleep.

Anyway, the point was to ask for confirmation if someone would happen to know that, it in fact, is a Goto-P picture and should be tagged as such, or, whether it just looks like one.

Confirmed. This is a Goto-P piece from the Clannad - Official Another Story - artbook. (Just found it today.)