Bunny Drop (うさぎドロップ) is a Japanese manga series by Yumi Unita. The plot follows thirty-year-old Daikichi as he becomes the guardian of Rin, the illegitimate six-year-old daughter of his grandfather. Bunny Drop was serialized in Shodensha's monthly manga magazine Feel Young from October 2005 to April 2011. Its chapters were collected into nine volumes by Shodensha. The series has been licensed for English language release by Yen Press.
An anime adaptation by Production I.G was broadcast in Japan between July and September 2011. A live-action film adaptation premiered in August 2011. A spin-off series, titled Usagi Drop: Bangaihen, was serialized in Feel Young from July 2011 to December 2011 and collected in one volume.
Plot
When 30-year-old Daikichi Kawachi returns home for his grandfather's funeral he learns about the existence of Rin Kaga, his grandfather's illegitimate six-year-old daughter by an unknown mother. The girl is an embarrassment to all his relatives and is treated like an outcast.
Annoyed by their attitudes, Daikichi decides to take care of Rin himself, even though he is single and has no experience in raising a child. As Rin becomes part of his life, Daikichi experiences the hardships of being a single parent. He is befriended by the single mother of Kouki Nitani, a young boy who Rin meets in nursery school, who gives him advice on raising Rin.