Secret base与你最后的夏天

"Secret Base ~You Only Live Once~" (秘密基地～你只能活一次～) is a song by Japanese pop group Zone. It was released on August 21, 2002, as their third single. The song gained significant popularity in Japan and became a hit, reaching number one on the Oricon charts.

The song is often associated with the anime series "Anohana: The Flower We Saw That Day" (あの日見た花の名前を僕達はまだ知らない。), which aired in 2011. The anime's story revolves around a group of childhood friends who reunite as teenagers to fulfill the wish of one of their friends, Meiko "Menma" Honma, who passed away. "Secret Base ~You Only Live Once~" is used as the ending theme song for the anime and has become closely tied to the emotional themes of the series, particularly the theme of friendship and the bittersweet memories of summer.

The song's lyrics, which talk about promises, friendship, and the fleeting nature of youth, resonate with the anime's storyline, making it a memorable part of the series' emotional impact. The phrase "君と夏の終わり" (Kimi to natsu no owari, meaning "You and the end of summer") from the song's lyrics has become particularly iconic, often used to evoke the themes of the anime.

"Secret Base ~You Only Live Once~" remains a popular song in Japan and is remembered fondly by many fans of the anime and the original Zone group.