Stone Wars Beginning.
Senku decides to make space food, so that they can eat during the war with Tsukasa. With the help of Chrome and Kaseki he makes cup ramen. That night Senku, Gen and Chrome decide to fool the Tsukasa Empire soldiers with the record of Lillian's voice, in order to raise their hopes about someone trustworthy out there. In the morning, Chrome, Gen and Magma prepare to go near the battlefield to set the phone. They make a blast with sound bombs in the forest to distract Homura, a member of Tsukasa Empire. The plan works and the three run towards the battlefield.