Kaname:
You guys celebrated your 1 year anniversary by going out for a Moonlight Picnic in a beautiful field filled with roses and orchids.
Zero:
Celebrated with Roses, Candles, Sushi and ending up in the bed together.
Yagari:
Celebrated by going out to a romantic dinner.
Kaien:
Celebrated by watching Disney movies and eating pizza.
Ichiru:
You two celebrated just by walking on the beach together while talking.
Hanabusa:
You two celebrated by just cuddling and relaxing. It was the best one year anniversary for you.
Rido:
Rido and you celebrated by having a romantic candle light dinner under the stars. Which made you really happy because Rido did plan it.
Takuma:
You both celebrated by shopping for more Manga and going to a romantic movie.
Senri:
You guys celebrated your guys one year anniversary by eating Pocky and listening to classical music.
Akatsuki:
You and Akatsuki celebrated by laying in a field of flowers feeding each other grapes.
Haruka:
You guys celebrated by spending time with each other in each other's arms.