AN: A couple of things to note - when Shiro first saw how Mephisto ended his letters, he scoffed, then wrote it in his own letters sarcastically. The habit stuck. Shiro and Mephisto have also known each other for two years already.

Hope you enjoy the following chapters! We'll be back to updating Sincerely next week.

January 15, 1990

Dear Shiro,

The cold nights grow colder without your presence. We are truly experiencing one of our harshest winters. How have you been? Are you taking good care of your health? I'm very well.

In fact, I have to say that I am actually extremely elated. I have some good news for you! You do remember Penelope-sensei, don't you? Just this morning, she came in to hand over her resignation notice on account to the new addition to her family (a healthy baby boy she's decided to adopt) as well as the desire to relocate to the country of her spouse. A rather joyous occasion, don't you think~?

Because of this, a position has opened up for her old Demonology class. As I am aware of how much you are enjoying your post as the Anti-Pharmacology teacher for the first year students, I've decided to sign you up to fill up the position yourself. I'm sure the students will be delighted when they find out. Please begin to make preparations for your new class as soon as you get back from your mission.

I am eagerly awaiting your return, so do your best to finish up matters promptly and with the greatest care.

Forever Yours,

Mephisto Pheles

January 21, 1990

Dear Mephisto,

Yeah, cold harsh winter and where do you send me? To the mountains. I'm fucking freezing. The ink in the pen I wanted to use is probably frozen because it WASN'T WORKING. Dammit, I can't even jerk off because one, I'm afraid my dick will get frostbite, and two, everyone keeps interrupting me and I can barely get a moment of peace!

But hey. Glad you're doing well. With your heat. And fireplace. And ten thousand blankets. Send me a goddamn space heater with your next letter if you want to be of any use.

Your good news fucking suck. Why are you going out of your way to tell me I have more brats to take care of? I have the first years AND second years now?! What the hell, Mephisto! Gimme a break! Why not give the position to a teacher who already knows the freaking kids? I swear sometimes I think you do shit just to piss me off.

As for the mission, if you even care for it, things are going fine. We should be done here within a week and a half so hopefully I won't have to die out here in the cold. The ritual circles are holding despite the blizzards so things are going as planned.

Hope you choke on a pocky stick.

Forever Yours,

Fujimoto Shiro

December 25, 1990

Dear Shiro,

A short reminder – don't forget to wear a tie to tonight's festivities. And get someone to teach you how to properly knot it this time. It would unbecoming to see someone of your rank shoddily dressed in one of our most renowned events.

Also, though I loathe being obligated to attend the yearly mass services, I must admit you made it a worthy experience this time. I knew you were verbose man, but yesterday's speech was truly inspiring – as expected of a man of faith! It almost managed to move this demon's tender heart.

I hope I'll be able to experience the sight of your eloquent tongue again soon. See you tonight.

Forever Yours,

Mephisto Pheles

Dear Mephisto,

If you're so unhappy with it, come over and tie it yourself. Either that or let me wear my clip-ons.

Or, you know, we could just skip the party? I know a better use for this tie than putting it around my neck. Or maybe you like it that way. In that case, I have a bit more motivation to learn how to tie it better.

Definitely see you tonight.

Forever Yours,

Fujimoto Shiro