Responses
At the beginning he was even skinnier than Byul actually xD
Actually if you look at the very early episodes of the original Dojin wasn’t big. He was tall but not that muscular. I always attributed it to the change in art style but now this explains it in universe.
Never heard of an alpha’s muscles getting bigger after falling in love, and dojin was always big in his story… but I went back and reread this from the beginning and byul was saying siwoo got bigger all of a sudden