Thank you friend. For those who don't know spanish, mine is a couple of years rusty spanish but this is the short of it.
Spoiler
A misunderstanding ensues concerning the uke and seme. Just when the uke comes to turn with his feelings he finds out his sister is suppose to marry the Himuro-sama. Which the uke concludes is the seme because he doesn't know the seme has a brother. So he gets all sad and mad and gets into an argument with the seme about wanting the leave the room and have some alone time and the seme is like you can't your body needs rest or something like that. (You shouldn't have folded him in half and plowed him so hard into the mattress if you're concern.-_-) Villain is revealed as the brother because he is jealous because of some money stuff or something so he attacks uke to get back at the seme. And seme comes to save the day by getting stabbed.
¡Gracias! (≧∀≦)
Muchas gracias!
If you can read spanish :chapters 1 to 5
http://www.tumangaonline.com/biblioteca/mangas/12609/Danshaku-no-Aijin