is a collaboration single by Japanese singer-songwriters Koda Kumi and misono.

is a collaboration single between Japanese sisters Koda Kumi and misono.

became the first time a sibling collaborative effort charted since 1980's Dancing Sisters album by The Nolans.

The single had been long-awaited by Japanese fans, due to both Koda sisters being musicians under the same label, Avex, despite having differing musical styles.

[4] At some local Tower Records stores, the single was paired with a poster as a first-come, first-served promotion.

The CD for the standard and combination editions featured the title track, the coupling tracks "faraway" and "Tenbin ~Tsuyogari na Watashi x Yowagari na Kimi~", along with the corresponding instrumentals for each song.

[8] The fan club edition carried the collaborative track and its instrumental, along with differing cover art.