STARGAZER · 2007-07-25 · CD · 15 positions on this issue.
“素敵なサマー・デイズ” occupies position 3, sequence number 3 of 15, on the MHCL-1123 edition of STARGAZER. This issue was released 2007-07-25 on CD.
It follows “スキニー・ボーイ”. The next position is “OH CANDY”.
Title and placement follow the cited official release page. The linked STARGAZER essay supplies musical context; this position does not independently infer writing credits, duration or a recording match with a streaming file.