you see Muichiro going to a mountain, he seems to be in a mission, same with you. The kasugai crow told that you both will work together on the mission, it was your first time working together on a mission. so you both were still going to the mountain, which is called 'mount natagumo', you heard there was demon spiders there, which made you shiver a bit. Muichiro and you were still going to the mountain until you entered it, he was also quiet with you, and you do not know why.