What breed is this puppy?

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Alright, so, this dog is not mine. It's a korean celebrity's I follow on Instagram. But the moment I saw this pup, I totally fell in love. The thing is, he seems like a mixture rather than a purebreed, and I haven't for the life of me been able to figure out what mix it is.

http://distilleryimage1.s3.amazonaws.com...a361_8.jpg

http://distilleryimage0.s3.amazonaws.com...4808_8.jpg

http://distilleryimage10.s3.amazonaws.co...1c6a_8.jpg

what breed cross does it seem like to you? i was thinking either bulldog or boxer. however, it is not a bulloxer.

thanks so much if you can answer xx.