With Yuuki by her side, Kaori has managed to make more friends in class even though her memories are er ased each week. As summer break approaches, though, Yuuki isn't sure their friendship can continue if Kaori doesn't see him every day...But there's an easy solution-they just have to meet up outside of school! It ends up being Kaori's best summer ever, but neither she nor Yuuki are prepared for what awaits them when classes resume...