
I feel the opposite. Shin sure has feelings and cares for Wolfgang, but his ambition is the main motivation in his life, so for him Wolf is first and foremost a piece of his plan and not his lover.
While Wolf dethroned the previous king to get his revenge, but mostly to please Shin. I do think he has a childish fixation for Shin, but there's also some of actual love in there.

Wolf became King for Shin, though.. He actually says repeatedly that pretty much everything he does is an attempt to please Shin. You have to understand that as a King, he's not in a good position to be saying he's in love with the Minister of Financial Affairs. He can't go around expressing his affections like that because it's dangerous for everyone involved, but he's made it quite clear through actions that he feels for Shin.
Aaa Shin does love Wolf, he pretty much acknowledged it in first chapters of this season and once again in 39 chapter. Yet Wolf NEVER said he likes Shin or especially loves him. Shin is in no position to express love to a king, who may not love him back. Remember when Shin send some girls to Wolf,Wolf was unhappy and send them away(all from 7 chapter), BUT he didn’t want to clarify their relationship after that? Wtf? Y all be like “what is wrong with shin”(emm child harassment, away from parents, don’t know healthy bonds). But you know what: what is wrong with Wolfgang?
P.S Yet I must give Wolf some credits, he is good in communication, calming Shin, showing he cares and saying that. It’s just never fails to amaze me how he didn’t confess nor clarify their relationship