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Friends Have Each Other's Backs ( () (なか) () わせの (なか) () たち Senaka Awase no Nakama Tachi) is the thirty-first chapter of Dr. Stone.

Summary

With the dangerous task ahead, Senku tells Chrome that he's going to inherit all 2 million years of humanity's scientific progress. Chrome says that's bad luck, but Senku says he doesn't intend to die, he's only trying to be practical. Chrome says that he's not going with that plan, and says that if Senku dies, so will science.

Kohaku overhears this conversation and remembers a situation years ago when she'd argued the same thing against her father. She refused to learn the 100 Tales if that meant Ruri could die. Instead, she vowed to keep carrying the hot water to her daily to keep her alive.

Senku continues arguing that their odds are best if only one of them goes, but Chrome insists having a scientist tag team will increase their odds even more. Senku finally relents after Chrome brings up the fact that Taiju and Yuzuriha are also risking their lives for him. He comments they'll have to make another gas mask thanks to him now.

Kohaku wistfully mentions that everyone would be happy if Ruri could marry someone like Chrome, but Chrome could never win the Grand Bout to even have the option to. Instead, Kohaku offers herself in marriage but Chrome calls her a gorilla.

With some extra crafting, another gas mask is made and the team is ready to confront Sulfurina once more.

Character in Order of Appearance

Chapter Notes

  • Senku wants Chrome to inherit his scientific knowledge in case he dies.
    • Chrome refuses it.
    • Kohaku did the same in a similar situation with her sister.
  • Another gas mask is made.

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Volume 1 1234567Extras
Volume 2 89101112131416Extras
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Volume 26 224225226227228229230231232Extras
Chapters not yet in tankōbon format Terraforming
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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
Episodes
New Stone World Arc
Chapters 194195196197198199200
Episodes
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Episodes
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232
Episodes
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