The teacher is a lazy tramp

I do not know anyone stronger than the teacher, sometimes it can be very cool, but what characterizes it most is that it is a lazy bum, the Master can not use weapons for some reason they always end up broken.
He always boasts that he is the greatest swordsman, but he can not use any sword because he breaks it. The teacher is like a big boy. He spends his time reading comic books and anything else. Sometimes he is very perverted, but the little sister's fists can always solve everything. However, sometimes the teacher seems very lonely. As if looking at a distant past.
Teacher can be terrifying, that's why my brothers and I are afraid of him when we ask him to train us. Master always says that we are very weak. I am the older brother, and this is the stories I recorded in a diary to remember the teacher .....