Prodded by a friend request, a feckless forty-something recalls his past relationships from the 90s onward, looking for his vanished hopes and dreams.

Mirai Moriyama
as Makoto Satō

Sairi Ito
as Kaori Kato

Masahiro Higashide
as Kenta Sekiguchi

Sumire
as Sū

Atsushi Shinohara
as Toshihiko Nanase

Yuko Oshima
as Megumi Ishida

Masato Hagiwara
as Hideaki Miyoshi

Takehiro Hira
as Keiichiro Sanai

Moemi Katayama
as Ayaka Iwai

Masanobu Takashima
as Takayuki Onda
Alunauwie
We Couldn't Become Adults presents a deeply emotional journey through loss and unresolved pasts, told with a compelling reverse narrative that ties beautifully into its ending. Strong performances, especially by Mirai Moriyama, elevate the storytelling, capturing the character’s growth across timeli...