Today (February 13) is Tatsuya Ryugasaki's birthday. He can be a little arrogant and self-indulgent, but he got his heart in the right place. Well, a few times here and there, at least.
In addition, we've got a short side story for everyone to enjoy:
TATSUYA: Ah. You're here to greet me on my birthday, right?
TATSUYA: Get on with it then - I don't have all day.
TATSUYA: Huh? What do you mean I look like I'm looking forward to it?
TATSUYA: It's natural to celebrate the birthday of someone you consider special, after all. And I'm definitely within the definition of "special", right~
TATSUYA: Now then, it's time for us to go~
TATSUYA: Huh? What do you mean you have something else to do?!
TATSUYA: It's my birthday and my wish is your command and all that! So be a good little pet and follow me!
TATSUYA: No talking back. You don't want me to punish you, right~
TATSUYA: There you go, good boy! Now ain't I nice - I wonder who's getting the birthday present out of the two of us, hehe.