Kaguya-sama: Love Is War – The First Kiss That Never Ends (かぐや様は告らせたい-ファーストキッスは終わらない-) is a 2022 Japanese animated romantic comedy film based on the manga series of the same name by Aka Akasaka, that was directed by Shinichi Omata, produced by A-1 Pictures, and distributed by Aniplex. It was released in theatres in Japan on 17 December 2022.
It is set after the events of the third season of the Kaguya-sama: Love Is War TV series.
Plot
In the aftermath of the Culture Festival, Kaguya Shinomiya agrees to accompany Miyuki Shirogane to Stanford University in the United States for school, giving him a kiss in the process. Later that night, Kaguya is horrified to learn from her maid, Ai Hayasaka, that she took it one step too far by accidentally giving Shirogane "an adult kiss".
The following day, Shirogane is anxious to discuss his current relationship status with Kaguya, only to find she's been transformed into "Little Kaguya" (a visual representation of her anxious and sleep deprived mind). After Kaguya falls asleep, she has a dream where her differing personality traits argue over what the best course of action shall be. Her uptight personality, "Ice Kaguya", angrily takes control from "Little Kaguya", becoming Kaguya's dominant personality.