Hey, old man...

Doesn't quite know about blood types

Contractor.

What is the color of your blood?

Eh, what...?

You're giving something to master on white day, right?

It's best if you know what her blood type is!

Since happy reactions are different by blood type,

Um... It's red... I guess...?

Why did you ask something like that?

I...Is that so...?

It is something that I need to know.