[2] Bunny Drop stars actor Kenichi Matsuyama, who plays Daikichi, an office worker and a single man.

[2][4] While attending the funeral of his late grandfather, Soichi Kaga, office worker Daikichi Kawachi learns about the existence of Souchi's illegitimate six-year-old daughter, Rin.

One day after school, Koki asks Rin to accompany him in visiting his father's grave at the cemetery, but their sudden disappearances cause panic for Daikichi, Yukari, and the people close to them.

Daikichi, his family, and Yukari are later seen watching a play in the daycare center featuring Rin and Koki, while Masako, who spots a photo published from the event on her computer, sadly looks on.

Shodensha's Feel Young women's magazine officially announced on 8 June 2010 that the manga Bunny Drop would be adapted into a live-action film.

Kenichi Matsuyama, who had previously starred in films like Death Note and Gantz, plays Daikichi, a 30-year-old who raises the illegitimate child of his grandfather.

[7] Mana Ashida and Ruiki Sato, who played the roles of Rin's kindergarten classmates, therefore did not have a prepared script to follow during shooting.

[8] A video of the filming showed that actor Kenichi Matsuyama was like a "natural parent" to fellow child actress Mana Ashida.

[8] In a scene where they were shopping at a department store, Kenichi looked peaceful while choosing bags and shoes for Mana Ashida.

[14] The duo said that they were big fans of the original Bunny Drop manga series, and that they used "lovely flowers" as material for this song.

[21] Over this two-day period, Bunny Drop attracted an audience of around 80,000 people, and grossed about 100 million yen nationwide.

[21] Mark Schilling of The Japan Times labelled the film Bunny Drop as "Bunny-based drama is a warm but overly fluffy tail" and gave it an overall score of 2.5 out of 5.

[22] He also praised child actress Mana Ashida, saying that she "seamlessly accomplishes her evolution from forlorn waif to perky if unusually perceptive kid, while effortlessly charming everyone.