Anime where a guy protects a girl and they fall in love?

YuYu Hakusho , Suzuka , Paradise Kiss , Nana , Tokyo Mew Mew , Chobits , Elemental Gelade , Saiunkoku Monogatari , Card Captor Sakura , Ah!My Goddess , Ai Yori Aoshi , 5 Centimeters Per Second ,Ayashi no Ceres , Angel Sanctuary , Aishiteruze Baby , B Gata H Key , Vampire Knight, Bokura ga Ita , Clannad , Clannad ~After Story~ ,Fruits Basket , Green Green ,Honey and Clover ,I''Pure , Love Hina, Ichigo 100%, Nodame Cantabile ,Ouran High School Host Club, Samurai X , Samurai 7, Air