Before I read thiss

Yes, he sleeps with two other men

wait but who does he love then? (≧∀≦)

Its reverse harem..its mc and his 3 husbands , the butler, the dog and the prince

I'd say he does love the king but he also loves sex so much that he keeps fucking everybody. But don't worry everybody is fine with the arrangement, you should read it for sure, it's very fun