It's August, and it's summer vacation! Passions run as hot as the sweltering weather as we follow each girl through their own summer love story. Will their dreams of making summer memories with Ichika come true? Who'll be the last one left standing beside him in the sun? Find out in the fourth volume of an emotionally-packed high-speed school action romantic comedy! There may not be any IS battles, but the battlefield of summer love is heating up!

"Please! Take care of my sister!" Ichika doesn't know what to do about Tatenashi's sudden request, but what he can do is take on the semifinals of the all-years tag-team tournament alongside her little sister, Tatenashi Kanzashi. What he can't, or at least doesn't want to do, is explain why he's on a date with someone the other girls don't know of. Will Kanzashi end up with him? Will Tatenashi and Houki stomp their way to a victory? The sparks of love fly between two sisters in the seventh volume of a high-speed school battle romantic comedy!