HUNTC-138 What?! 80%? What kind of number is this? A world where the probability of getting laid is visualized and only I can see it! What is that number visible above my head?!

After being rejected by the girl I liked, I was so disappointed that I fell down the stairs and fainted. However, when I regained consciousness, I noticed that there were some numbers and percentages displayed above the heads of everyone I could see! What on earth were those numbers? I desperately tried to find out the truth, and it turned out to be the "probability of getting laid"! I discovered that an unexpected girl wanted me! At this point, I was invincible. I started by attacking the girls with the highest chances, and it was easy and fun! I didn't need love or romance anymore!