Tsukushi joins Kazuya and his family for Summer vacaction at their villa in Atami. Friction erupts between Kazuya and Domyoji after Tsukushi and Domyoji's kiss at the end of volume two. Even more juiicy tension develops between Shizuka and Rui, but does anything become of it?! Tsukushi overhears Rui telling Shizuka what he thinks of Tsukushi. Domyoji begins spreading rumors that Tsukushi is in love with him. He soon finds out that she is in love with Rui and he goes on a rampage. His rampage extends to an attack on Tsukushi herself.