On his first day of junior high, Kei Enjoji fell in love at first sight. His heart was immediately captured by the gorgeous Ranmaru Samejima, a young kendo prodigy, and the two slowly formed a deep romantic bond. Now adults and living happily together as a couple, things seem to be going well for Ranmaru and Kei. One morning, host Kei arrives home after a night out drinking with a client. A frequent occurrence, Ranmaru is initially unfazed by Kei's drunken state—until he notices three extremely suspicious things: Kei's clothing smells of makeup, his chest is stained with lipstick, and he is carrying matches branded with the name of a love hotel. To top it all off, a woman calls the apartment asking for "Kei-chan," and at that, Ranmaru loses it. Hurt by Kei's unfaithful actions, Ranmaru storms off. He spends the day reminiscing about years of precious memories, deciding to put them behind him for good—and when he is "picked up" by a woman on the streets, he comes to terms with reality. If this is what society wants, and if Kei has truly fallen for a woman, then who is he to stand in their way?

"One day, a girl who loves me will suddenly appear before me"—Middle school teacher Nobunaga has always been dreaming of such a gal game-like situation. However, the one who appeared before him was Kichou, a 14-year-old girl who proclaims herself as his wife. Appears to have arrived from the Sengoku era, she mistakes Nobunaga as Nobunaga Oda and urges him to conceive a child with her. Thus begins the age-difference love comedy between a gal game-loving teacher and a Sengoku era expert princess.

Japanese yakuza clan heir Ranmaru just got married on a lavish cruise ship, but things aren't as they seem. The marriage is just for the appearances, and he ends up getting drunk and spending the night not with his bride but with the sexy ship captain. When the two men meet again in Italy, it is the start of a spectacular love story.

After seeing her jump onto a subway at the last second and getting her ankle crushed between the doors, Nishi reconnects with his high school sweetheart, Myon. Nishi is still very much in love with Myon, but is shocked to learn that she is engaged to another man. Nishi agrees to meet Myon's fiancé at her family's Yakitori restaurant, but members of the Yakuza storm the joint and murder Nishi when he tries to stop them from raping Myon. Nishi, now dead, wakes up and meets a constantly shapeshifting god, who mocks him for dying. The god tells Nishi to walk into a portal and disappear from existence, which Nishi rejects, choosing instead to sprint past the god and reanimate. With a new outlook on life and knowledge of how the Yakuza are going to attack him, Nishi kills one of the Yakuza with his own gun, fleeing in a stolen car with Myon and her sister. Acclaimed director Masaaki Yuasa's debut film, Mind Game's constantly shifting visuals tell a story about living one's life without regrets that is unlike any other.