It was too obvious that Brad liked Rudy. I figured it out when they showed the flash back of Rudy babysitting for him when he came to the castle as a little boy. https://www.mangago.me/read-manga/datsuryoku_kei_maou_sama_no_yuuga_na_hibi/uu/d_v-1-chapter-4.2/pg-33/
It was too obvious that Brad liked Rudy. I figured it out when they showed the flash back of Rudy babysitting for him when he came to the castle as a little boy.
https://www.mangago.me/read-manga/datsuryoku_kei_maou_sama_no_yuuga_na_hibi/uu/d_v-1-chapter-4.2/pg-33/