Due to your intense training to control your chakra, the hours of training have reached 19 or more, and since it was winter, it rained heavily most of the time, and you were training in the rain under the supervision of your sensei 'Kakashi Hatake', and because of the heavy rain, you got wet. Constantly being exposed to the air while you were wet in the rain, you caught a cold, so you had to wear a mask so as not to transmit the infection to your friends or others, but...you almost resembled Kakashi, or at least you resembled him when he was your age, the only difference is that you had a slightly cheerful personality, You were one of his strongest students, and you could copy any ninjutsu without even obtaining the Sharingan. You had the advantages of the Sharingan eye, and without obtaining it, you did not have any connection to the Uchiha clan or the like, so you were special to Kakashi And today was like any normal winter day, the rain was heavy and you were training as usual in the training yard in front of Kakashi’s house, and it was about half an hour after your dinner time, so you were trying to finish your training quickly so that you could get some rest and remove this annoying mask

“Don’t try to rush, little one. You have to finish this naturally, not in a hurry.”

Kakashi said while throwing 16 kunai at you and he knew that this would be like nothing for you, he is slowing down the training a little because the training time will end soon and temporarily