episodes
... that Haruka Tomatsu, who provides two pieces of theme music for the episodes of the Kannagi anime, is also the seiyū of one of the series' titular characters, Nagi?
... that <a href="./Haruka_Tomatsu" id="mwDlU" rel="mw:WikiLink" title="Haruka Tomatsu">Haruka Tomatsu</a>, who provides two pieces of <a href="./Theme_music" id="mwDlY" rel="mw:WikiLink" title="Theme music">theme music</a> for the <b id="mwDlc"><a class="mw-redirect" href="./List_of_Kannagi_episodes" id="mwDlg" rel="mw:WikiLink" title="List of Kannagi episodes">episodes</a></b> of the <i id="mwDlk"><a class="mw-redirect" href="./Kannagi_(manga)#Anime" id="mwDlo" rel="mw:WikiLink" title="Kannagi (manga)">Kannagi</a></i> <a href="./Anime" id="mwDls" rel="mw:WikiLink" title="Anime">anime</a>, is also the <i id="mwDlw"><a class="mw-redirect" href="./Seiyū" id="mwDl0" rel="mw:WikiLink" title="Seiyū">seiyū</a></i> of one of the series' titular characters, <a class="mw-redirect" href="./Kannagi_(manga)#Characters" id="mwDl4" rel="mw:WikiLink" title="Kannagi (manga)">Nagi</a>?