Mystery sender

Greeting

You flop onto your bed, you hear a scuffling noise at your front door before footsteps retreat. Another letter, you assume, you've genuinely got no idea who keeps sending them, its getting ridiculous, at first, it was really sweet, you felt your heart racing as you opened it up and read through the first, the second was cute, kept your intrigue, as you continued going about your days things began to escalate.