Puppy is the first album of the duo YuiKaori. This is their first release under Style Cube. The album was released on September 21, 2011 in two editions, one regular and one limited. The limited edition of the album came with a bonus DVD. On October 23, 2013, the album was re-released in a special edition that contained a bonus Blu-ray disc containing the music videos for five of the tracks.
"PUPPY LOVE!!" was the ending theme for the Nico Nico Douga internet series Denpa Kenkyuusha for September 2011. "Miraigata Idol" is a cover of the opening theme song for the 1997 anime VS Knight Ramune & 40 Fire. "Kakenukete Blue" was the opening theme for the YuiKaori web radio show YuiKaori no Mi♪Digital. "Crystal no Chikai" is an image song for the PS3 game Hyperdimension Neptunia Mk2, in which YuiKaori both voiced characters in.