One day, Yoshimi Numamoto suddenly receives a marriage proposal from a beautiful girl, when he doesn't even know her name. Apparently, she is a super-wealthy young lady. How can she she be so sure of herself? He can't help but feel embarrassed at the situation, but she remains insistent... and soon his school life will be turned upside down! The sparkling girl x plain boy super-darling love comedy begins! (Source: Weekly Shonen Magazine, translated)