Futago Matomete "Kanojo" ni Shinai?

Chikage is the picture of perfection at school—a beautiful, intelligent, and well-mannered classmate who stands as my greatest academic rival. Yet behind her flawless classroom persona lies a completely different side that no one else seems to know about. Once the final bell rings, she transforms, frequenting the local arcade with an innocent, carefree smile that would be utterly unimaginable during school hours. Intrigued by this hidden facet of her personality, I make a conscious effort to bridge the gap between us, befriending her on campus and joining her for after-school gaming sessions to truly understand who she is. Our shared time gradually breaks down the walls between us, and our bond deepens into something far more meaningful than mere rivalry. The turning point arrives unexpectedly when Chikage confesses her feelings for me just as we are leaving the school grounds. Overjoyed, I accept her confession without hesitation, later reciprocating her honesty by sharing my own feelings on our walk home from the arcade. Believing that she is now officially my girlfriend, I feel as though everything has finally fallen into place. However, my relief is short-lived when another girl suddenly appears—claiming to be my girlfriend as well.