Itazura na Kiss Vol. 6 (manga)

Kotoko can't believe that her most far-fetched fantasy has come true: she's finally married to superstar Naoki! But just when Kotoko begins to feel like the coast is clear (for once), a honeymoon horror springs to life when a sexy troublemaker hits on her man! And what on earth could be keeping Naoki from officially registering their marriage, anyway?!