I was Rejected 10,000 times by My Childhood Friend, but After I Gave Up, I Suddenly Started Getting Popular?

In the summer of my first year of elementary school, I confessed to my childhood friend, Karen, within two minutes of coming across her. Many years have passed since then, and I am now in my second year of high school. As of now, I’ve confessed my feelings to her 9999 times. Every time, I was rejected. But, I didn’t give up, and so I made this 10000th time my last chance to confess to Karen. “I’m sorry” she rejected me right away! I finally gave up and started trying to find a new love. But then, Karen started coming onto me, and I started to get popular?! What? Why? The mentally strongest high school student will be born here! Most of the characters are idiots, but they all go through th...