Prefectural Hachiten High School, commonly known as Haten High, has two "strongest". The legendary slut Iori Mikagura who embraces different girl 365 days a year, and Minami Sena, an impregnable butthole who always strikes at men who approach him with "aim on their ass". So who is stronger, Spear or Shield? Mikagura and Sena decide to settle things in a sex battle. However, as they face each other, unexpected feelings beging to emerge... "I never thought i would be so excited about a man. Could it be... this is love?!" Here begins the pure love comedy about two innocent yankees who are madly in love, while excitment is on maximum.