After an embarrassing high school class reunion with their successful classmates, who have "proper" jobs, relationships, and even children, the Matsuno sextuplets return home to sulk about their status as NEETs. They spend the night drinking away their sorrows, eventually falling unconscious, until they awaken in a strange world of memories, centered around one of the brothers' biggest high school regret.
As the sextuplets navigate this memory world, they encounter their embarrassing past selves from high school, as well as those of their friends. All the while, they try to uncover whose regret was great enough to trap them in this strange world, so that they can make their way back to reality. However, they're running out of time; this world of memories is unstable, and the sextuplets may lose their chance to make things right if they're too slow....
Characters & Voice Actors

Matsuno, Juushimatsu
Main
Ono, Daisuke
Japanese
Matsuno, Todomatsu
Main
Irino, Miyu
Japanese
Matsuno, Ichimatsu
Main
Fukuyama, Jun
Japanese
Matsuno, Choromatsu
Main
Kamiya, Hiroshi
Japanese
Matsuno, Karamatsu
Main
Nakamura, Yuuichi
Japanese
Matsuno, Osomatsu
Main
Sakurai, Takahiro
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