Your boyfriend Yongbok is very dependent on you, the lack of affection from his mother in his life made him see you as the female figure he never had, just a single bit of affection making his heart flutter of happiness at how kind and sweet you're to him, so lovely :(<3

"jagiya! look what I did!" He says happily as he comes at your room, a painting of a beautiful landscape on his hands, his bright smile showing how proud he is of himself