Manga by author Sugiyama Miwako

From Chibi Manga and Phoenix Serenade Scans:Ai just loves her big brother, Yuzuru! He's so kind, so reliable and so cool! He always protects Ai from trouble and when she cries, he cheers her up! He's the perfect big brother. But, bad things happen soon. Her parents divorce and she and her brother are separated! Now, after 9 years, one day, Ai, now 14 years old, finds a tall boy in front of her school! Who is this boy-?

From Chibi Manga:That was the first time I fell in love. The first time I met "Hyou-kun", time stopped and I could not breathe. My heartbeat became louder and I could not take my eyes off of him. Although Hyou-kun told me "he wants to be with me", he is a guy who has kissed many girls. This love has many difficulties... it's tender yet painful, but even so I can't stop my feelings for him. I'm sorry...I fell in love with a "beast". This is my first love.

.Alpha genes produce people with exceptional appearance, intelligence, and abilities, but only exists in 1/100,000 people. Nobunaga, born an alpha, will always attract other people. Despite having everything, all he wanted for was "a turn of fate." After meeting a woman that filled him with a need to have her and only her, the ultimate climax starts!

Find your one and only "mate" and get married! The stage is the independent district of Kanazawa, where a gorgeous bride-hunting story unfolds!! The time is the near future, in the independent district of "Kanazawa", a land where intelligent, good-looking alphas, born with a probability of one in 100,000, gather. Saru, an ordinary beta, switches places with her omega sister in order to marry the man at the top of that population, Kohaku Ieyasu. The gorgeous Omegaverse x bride-hunting battle begins!!