Goman Reijo to Haraguro Kikoshi No, Dasan Kara Hajimaru Damashi Damasare Koi Moyo 1 (Arianrose) [Light Novel]

[Machine Translation] Aria and Nodice, children of a prestigious duchess, are each looking for a marriage partner who is convenient for them. They are both full of calculations, but as they try their best to seduce each other, before they know it, they are completely in love with each other. Just when they think things are going well, Aria's twin sister, the troubled Laila, is making some suspicious moves... A battle without honor begins between the self-satisfied sister and the bruised sister...

名門公爵家の子女であるアリアとノーディスは、それぞれ自分にとって都合のいい結婚相手を探していた。打算だらけの二人だったが、お互いに相手を籠絡しようと頑張っているうちに、いつの間にか相手にすっかり惚れ込んでしまう。婚約も決まり、順調に進んでいると思っていた矢先に、アリアの双子の姉である問題児のライラが何やら怪しい動きをしていて...自サバ姉VSあざと妹の仁義なき戦いが始まる―。