After they killed Kyogai Muzan called a meeting of the lower ranks where he killed everyone except Rui and Enmu, he told them to go on the endless train where Hiromo would have to appear
After that Rui said that he will leave tomorrow night and a new day has arrived and the adventure should continue until
All three stood up and Hiromo said that he would finally take a break from missions, Inosuke said that they still had to train while Zenitsu just whined and said that he would die if he continued to train
Hiromo said that Inosuke was right and they trained again like last time and after a day spent in training night came and with that Rui and Enmu started and thanks to their speed they arrived quickly
Enmu said that he will put the people on the train to sleep while Rui said that he will kill them but he said that it is better to do things in your own way because demons are known to never cooperate
Meanwhile, the crow came to Hiromo and told him that they have a mission on the endless train and that there are too strong demons there and that all three will have to go
Hiromo said that they were most likely low-rank demons and told Zenitsu and Inosuke and Zenitsu agreed to their surprise but Inosuke also agreed and said to leave immediately because it was already night
After a few hours they reached the train and got on the train but all the passengers were asleep and it was strange for them, but Hiromo felt a strange power on the train
He said it was most likely a demon and they all hopped on the train and they saw a black cloaked demon and it was Enmu who said he was glad to meet them and he would be glad to kill them
Zenitsu fainted when he saw a demon at the end of the train that was like a child but had the color of a spider
He introduced himself as Rui and Hiromo saw in his eyes that he was a lower rank 5 but when he saw Enmu he saw that he was a lower rank 1 and remained paralyzed and told Inosuke that Enmu was the strongest lower rank
Hiromo moved towards Enmu using an improvised first form fire slit but Enmu created things like large earthworms that were purple but Hiromo cut them off
Inosuke said that he will attack that kid but Zenitsu also got up and said that he will help him and he went towards Rui using thunderclap and flash but Rui attacked him with his webs and cut Zenitsu's cheek and then Inosuke jumped and attacked him with his sword but Rui dodges him and in the meantime cuts his hand
Hiromo couldn't believe how strong he is if he is a lower rank 5 but Rui answered him that he had a family but they didn't listen to him so he killed them and since he gave his family his blood that blood came back to him and when they kill them it will come back to challenge Enmu for the position of strongest lower rank
Hiromo went towards him but Enmu stopped him and said he was fighting him and Enmu attacked him again but when Hiromo swung his sword and managed to cut them down he got to his neck but Enmu dodged him and shot him with his foot and Hiromo flew back a few meters
Hiromo moved towards him again using an improvised second form fire wheel of death and cut Enmu's arms, Enmu then regenerated them
Hiromo asks why everyone on the train is sleeping and Enmu replies that his power allows him to put people to sleep and show them their beautiful lives
But Hiromo angrily tells him that he just wants to kill them and he said that he won't allow it and he jumps towards him and swings his sword but Enmu puts him to sleep and soon Hiromo finds himself in a dream where he is near his house and he saw his parents waiting for him saying that they can't wait for him to come with the water
Hiromo saw that he was carrying a bucket of water in his hands and asked if this was real or just a dream, his sister tells him to hurry because everyone is thirsty and he runs towards them
Meanwhile, Zenitsu and Inosuke dodge the web form attacks and saying that his attacks are fast
Zenitsu runs at lightning speed and uses thunderclap and flash sixfold and attacks from six angles in one attack
Inosuke uses the third kandzu devours, Rui says that they are still weak and uses a web attack that is as wide as a big house but Zenitsu passes and cuts all his webs while Rui says in amazement that he didn't expect that
Inosuke says that Zenitsu is actually very fast and when he saw Zenitsu getting close to the neck he runs and uses the second kandzu kriska and also cuts all the webs
Zenitsu punches his neck as does Inosuke but Rui says that his neck is more durable than his net, His hands and his net turn red as blood
Rui uses the demon cage blood technique to cut the threads and creates a cage of blood threads and Inosuke says it's impossible to avoid it and they're done
At that moment Zenitsu stepped back and used thunderclap and flash eightfold and managed with his speed to deflect his demon blood technique until Rui couldn't believe it
Rui said that he is much stronger without his family and will become a lower rank 1 and so, filled with the fury of the multi-threaded attack both Zenitsu and Inosuke walked away saying that it would be a tough fight
Meanwhile, in his dream, Hiromo is sitting in the house with his family but he says that he has to go back and his mother asked him where he is going and she tells him to stay but Hiromo cries and says that they will meet again sometime
When he ran out of the house he was crying and said that he must probably kill himself in his dream in order to return to reality, Hiromo managed to kill himself by slitting his throat and woke up
Enmu wondered if he killed himself but Hiromo killed himself again and came back to life, Enmu couldn't believe it and Hiromo was getting closer and closer with every step
Hiromo used the fifth impromptu form dragon fire slit and cut his head, Hiromo said that was it but Enmu just laughed and turned into a big monster from which endless eyes came out looking at Hiromo
Meanwhile Rui attacks while Inosuke and Zenitsu try to figure out how to kill him and Inosuke is startled to see monsters with eyes and Hiromo fighting him
Zenitsu said that he will take care of Rui first then help Hiromo, Inosuke said that this fight is actually exciting and he uses the first kandzu pierce and tries to stab Rui's neck but Rui's net cuts Inosuke's arms but Inosuke continues to attack but to no avail
Zenitsu uses thunderclap and flash again but Rui dodges the attack but Inosuke manages to cut off his hands saying they found a way to kill him
Hiromo uses the ninth form of 100 Fire Dragon Roars but Enmu hits him and sends him to the start of the train as Hiromo says that they will have to fight until Inosuke and Zenitsu defeat the other demon