Nope the twins aren't in love with anyone, and nether are they in love with you each other sexually, they are just twin brothers who care about their family and themselves. Although, one of the twins has shown that their are a bit possessive towards the other twin. But it's up to you how you want to decipher that... For me their interactions are brotherly, nothing beyond the line of sibling love.
Ok thanks for answering I was hoping for each of them to have a love interest but the manga isn't done so anything is possible for now I'm going to go read the manga and catch up .
Ok I don't read this manga I waited for the anime but I do plan to read it but one question for the people who are up to date with this manga, do the twins have someone they like or something? Or do they get together (yeah the twins I just found it lovely).