So I just came across this and thought "Where have I seen this before?". I get that these series share an illustrator, but did they have to go so far as to create another series' OST cover with a character in the exact same place, in front of the same town, with the same guardrail with the same vine growing on it and go so far as to invent a now fake set of the same brand headphones to wear? I wonder if they didn't expect anyone to notice.

Context: Seiren is the sequel to Amagami, set in the same town, same high school, same story structure, just 9 years later. So the similarity is more than just because they share the same illustrator.