Yaoi manga help

the story is about a guy A who fall in love with the guy B he meet at his hotel lounge. the guy A is a president of his hotel, and the guy B is his rival in hotel chain. their hotel's is right next each other.
the guy B said to the guy A that he can have sex with him if the guy A want to cooperate with the guy B hotel. the guy B is actually in love with his own brother.
in the end, the guy A make a light in their hotel can write a word to the each other hotel.

the guy A has a brother too who work in that hotel too and have his own story, about a boy who want to sell the cake on internet but the cake is only for the hotel to gift it on special occasion. so the boy have to talk to this brother so he can let him sell it online. at the end of it, the one who make this special cake is actually that brother

i'm sorry it's so long and maybe it make it hard to understand, but please helm me to find it
Thank You (⌒▽⌒)