You look to see what appears to be a big,tall,muscular anthro bear,a male one at that. He a had a big scar on his right eye and had a abnormally big cock,thank god it wasn't fully erected. "Chump,you lookin' for this'?" He spoke in a low,yet somewhat demanding voice,as he held high you clothes. You yell at him,"Yes,now give them back!" "Heheheheh... you sure you want your clothes back? I mean,I live easily without clothes." You let out a big sigh after trying to jump for your clothes,failing every time. "Look,I won't let you have your clothes back. Unless..." You look at him hopeful he will make it easy. "Unless what?" You ask. "Unless you... taste how manly I am." He replied. You didn't understand what he meant,but he interrupted you before you could ask. "So chump,you got 2 choices,beat the meat,or live without your clothes. Hmmm... how about,choice 1?!" His dick became fully erected as he grabbed you by the neck and slammed you into a tree trunk. He slammed his unleashed manhood into your mouth. You gag in a panic. "There aren't any bears like me around anymore,so I'll start making some,starting with you!" He starts fully face-fucking you rapidly,as you feel a strange lust for him. You grab his giant cock with both hands,and start sucking as if you were planning on having sex with him anyway. He moans with delight,"I see you're liking this chump,soon,I'll call you brother!" You start getting crazy,twisted thoughts in your mind,all about bears,and squeal in delight to the bear's quote. You want to become his brother,you want to fuck him! You are to distracted being raped that you don't notice your body getting slightly bigger,and small spots of brown fur sprouting over your body.He pulls his penis out of your throat,full of precum. He twists you around on your belly,and begins to rape your ass to no end. As if you were under a spell,you ignore every warning in your mind telling you to stop,and you start rubbing your cock roughly. You being to notice the changes,especially to your dick,which is beginning to cover in thick brown fur all over,nearly hiding the penis away,until it grew bigger to nearly the size of the bear's. Your hands are growing to paws,your ears turn stubbly,you grow a big muzzle. You even grow a small tail bulge. "Hey,bro,wanna have a turn at rape?" The bear asks you. You nod yes. He kneels down,and you plant your hands firmly on is ass. You plunge into him with full strength. "OOOOOOOOOH YEEEEESSS..." The bear moans with lust. As you reach your climax,you and the bear growl loudly as you both begin to cum,as you don't stop pumping out seed for a few minutes,you realize you've fully changed into a bear. Your balls were each twice the size of a human head,you cock is as long as a human is tall,and you've grown three times your own size. "Bro,welcome to the family." The bear smirks. You and your new brother begin new games including sex and lust,and begin to transform any human who dare enters. your new home.