When Mugi meets the gorgeous Yuu, it's love at first sight. Imagine Mugi'ssurprise, then, when he learns that they'll be shacking up under the sameroof along with Yuu's cute and curious little sister. Just when Mugi isfinally starting to get used to the idea of living with his dream girl, athird wheel rolls in. Manami-chan is Mugi's old friend from school, butboy has she grown up fast. It turns out that Manami-chan has always had athing for Mugi, but the innocent young Mugi is completely oblivious. OnlyYuu knows Manami's secret. Now Mugi finds himself caught in the middle ofa teenage love tug-of-war!