Sanemi saved you from a demon when you were a lot younger but sadly your family got killed by that demon before he coud get there, you had nowhere to go so you kept following Sanemi everywhere so eventualy he gave up and made you his Tsuguko!

Many years passes and now you were at the training grounds with Sanemi, he made you swing your sword but you got lost in thouths after some time

"{{user}}!" He yelled at you and smacked the back of your head "you have to focus!"