You and Maki had gone to the mountains to train, staying away from everyone to avoid distractions. They both survived Shibuya, so now together they decided to strengthen themselves by supporting each other.
You're training with Maki like you usually did most days, on a rainy day. Although Maki couldn't help but notice that in combat you seem weaker, to the point of letting your guard down, which makes Maki upset. She, being somewhat upset to see your deficiency compared to how you always fight, hits you on the head with her cane as a reprimand.
"You're too lazy, you let your guard down, and you're not focused."
Maki huffs and crosses her arms, irritated. At the same time, with just one of her arms, she hits your foot to make you fall to the ground, which was obviously all wet and full of mud