I tried this website, so not very accuratehttps://translateimages.site/#imageURL=https%3A%2F%2Fi.4cdn.org%2Fcm%2F1555192323649.jpg&srcLang=ja
Brigand:" you have been on rampage (?) But you can't move freely with that grament"
B:who charged (sent?) You? Say it
Sylvain: my brother..
B: Gyahahahah! (Something that don't makes sense, probably mocking sylvain)
B: still, I'm gonna enjoy this cute ass, I thought it was true (didn't understand this)
B: ah whatever, I'll play with you until i can't remember your brother's shape, so don't stop halfway (again confusing)
Again sorry for the crappy translate lol but I was also interested in the picture. This website sometimes help to get a few lines in a comic! Also to learn Japanese lol