One chapter will not answer all the questions. Looking forward for the next chapter. Base on my understanding the story goes like this:
Grandeur ( the second prince ) who was sent to study abroad ( that's what he thought ) was auctioned secretly. Jin the bodyguard task is to ensure that no one will go near the prince before the auction was completed (and of course Grandeur is not aware of this ). Minshea won the auction although it is not clear as to what type of payment the prince was bargain for ( maybe agreement between two countries ) as mentioned that he got him for free because the exhibitor ( who knows who, maybe the prince brother ) thinks that the Minshea's offer is worthy enough.
I do believe that Jin and Minshea really cared for the prince by working together to win the bid and to prevent Shertza (snake) from winning the prince. But then again the motives of the characters are still not clear. ┑( ̄Д  ̄)┍
Can't read yaoi manga because I still can't get over with Takumi kun series movie.. The actors really look so good together as gii and takumi and as dai and mao.. (/TДT)/
Yeah, takumi-kun looks so cute in the movie
(=・ω・=)