Koi Nikki / Summer Mission

 is the seventh single by Ueno Yuuka.

Single Information

 * Lyrics: Uzumoto Naoki (track 1), Harukazu Aya (track 2), Okita Setsuna (track 3)
 * Composition: Odaka Kotaro (track 1), Ooyagi Hiroo (track 2), h-wonder (track 3)
 * Arrangement: Sekine Yuki (track 1), Odaka Kotaro (track 1), Ooyagi Hiroo (track 2), Tokinori Koichiro (track 3)

Regular Edition CD

 * 1) Koi Nikki (恋日記)
 * 2) Summer Mission
 * 3) Nijiiro Shabondama (虹色シャボン玉)
 * 4) Koi Nikki (恋日記) (off vocal ver.)
 * 5) Summer Mission (off vocal ver.)
 * 6) Nijiiro Shabondama (虹色シャボン玉) (off vocal ver.)

Limited Editions CD

 * 1) Koi Nikki (恋日記)
 * 2) Summer Mission
 * 3) Koi Nikki (恋日記) (off vocal ver.)
 * 4) Summer Mission (off vocal ver.)

Limited Edition A DVD

 * 1) Koi Nikki (Music Video)
 * 2) Koi Nikki (Music Video Making Video)
 * 3) 18th Birthday One-man Live Digest Video (2016.2.7)

Limited Edition B DVD

 * 1) Jacket Photos Making Video
 * 2) 18th Birthday One-man Live Selection Video (2016.2.7)