Kick-Heart

Kick-Heart is a 2013 Japanese anime short film that uses surreal-psychedelic animation and storytelling to tell a love story between a professional wrestler and a nun. The film was directed by Masaaki Yuasa through Production I.G studios, who ran a successful Kickstarter campaign to fund the short. The short screened on Toonami in 2013 and has screened at several festivals such as the BFI London Film Festival.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.