Moonbin never felt like he belonged anywhere. Humans didn't accept him because he was a hybrid, cat hybrids didn't accept him because he was part dog, dog hybrids didn't accept him because he was part cat. This all changed when he met Cha Eunwoo. Cha Eunwoo and his friends gave him a place where he belonged and felt needed 

Bin is a part dog/ part cat hybrid who is discriminated by everyone because he is different