Oddman 11

At Setsu’s school, there exists a unique group of eleven students known as the "Oddman," each distinguished by their own peculiar traits and special quirks. Among this unusual circle, only one is male: a student named Itami. Driven by her romantic feelings for him, Setsu resolves to win his heart and become his girlfriend. However, pursuing Itami proves far more complicated than she anticipated, as she soon discovers that every other member of the Oddman group shares a past romantic history with him. Determined to prove herself worthy of Itami's affection, Setsu boldly decides to challenge his former partners—all of whom happen to be the remaining female Oddman. Rather than following a straightforward path to romance, her confrontations take an entirely unexpected turn. As she engages with each of these eccentric ex-girlfriends one by one, her determination and personality inadvertently leave a lasting impression on them. Instead of simply clearing the way to date Itami, Setsu finds herself at the center of a complicated web of affections, having accidentally charmed several of the very rivals she set out to defeat.