A Foolish Alpha Asked Me to Mate With Him

From Renta!:

Rio, an omega and a wolf in sheep's clothing, hates alphas. One day Keisuke, an alpha, asks Rio to be his boyfriend. With the hope of finally getting revenge on alphas, Rio decides to go out with him. But, despite Rio's attempts to hurt Keisuke, Keisuke insists on treating Rio right. Rio's surprised at how unlike other alphas Keisuke is...
Conflicted by his hatred for alphas and his desire to be moved by Keisuke, Rio risks it all!