Everyone can see that Gu Qingyu likes Huan Junmu, although he has never said it explicitly.
Huan Junmu is an absolutely rational demon when it comes to feelings. When it comes to regaining the power of the supreme demon king, he will certainly not choose the latter when it comes to regaining the power of the supreme demon king or having several absurd encounters with him as a nominal master.
Motto: "I thought you were pretty the first time I saw you."