NATURALLY · 1986-06-25 · CD · 11 positions on this issue.
“一秒の夏” occupies position 4, sequence number 4 of 11, on the 32BTC-121 edition of NATURALLY. This issue was released 1986-06-25 on CD.
The preceding position is “ワインな想い出”. The following position is “PRIVATE NUMBER”.
Title and placement follow the cited edition evidence. The linked album essay supplies cultural context; this position does not independently infer writing credits, duration or a recording match with a streaming file. Selected object: eleven-track CD 32BTC-121. Position 2 retains its Japanese-version label and position 11 its New Remix long-version label. No master equivalence with an LP, compilation or digital recording is asserted; position 11 is not given an unsupported official bonus label.