Valentine's Day help (Japanese language question)

Okay, I’ve got it in my head to draw a valentine for this girl I’m seeing (I’m a computer artist), and I need some help from any Dopers that know Japanese. She’s into anime and japanese stuff, just like me, so I’m going to make this picture of a ninja kneeling on a floor, blushing a little, and saying:

My Princess, I humbly wish to honor you this Valentine’s day by killing 150 men in your name!

Anyway, I’m going to put the message in yellow subtitles at the bottom of the picture, but if it were possible I’d also like to have it written vertically in Japanese off to the side. This girl knows some conversational Japanese and has lots of Japanese friends, so if I were to include the Japanese text it’d have to be on the money or I’m sure to get called on it.

Does anyone know how I’d go about getting an accurate translation of my message into written Japanese?

Thanks!

You could just wait one month. In Japan (and Korea, also), Valentine’s Day is the day the girl gives stuff to the guy. Whitge Day, on March 14th, is the day for the guy to give stuff to the girl.

お姫様の華麗な心への忠義を明かすが為、我輩、このバレンタインデーには150人の男を切ります!

Yeah, I don’t know. I thought it was a funny number.

Oh man, thanks Sage Rat! I first read your reply last night at home and I didn’t have the right language pack installed. All I saw was “150!” so I thought you were exclaiming at the number of men to be killed.

I appreciate it!