Here's the Gareth volume extra.

Title: Necromancy time (1)

Is that Mystery Package guy one of your acquaintances, Anne? You are worried for him... aren't you??
I don't think he is the one to let himself be caught so easily.

Then how about I go save him, easy and simple?
Don't even think about it.

How much more are you going to get yourself hurt lightheartedly boasting around?
While you've grown into a fine guy body-wise, you haven't grown a bit inside you... so get yourself together!!

Huh!?
You... talking as if you know me--

...is what
your mom said.