Rascal Does Not Dream of a Christmas Bond

A week before Christmas Sakuta Azusagawa goes to sleep in his own room, but wakes up in his girlfriend's bed, bound together by their hands. What's causing the mysterious phenomenon and how can they solve it this time? Spoilers for: "Rascal Does Not Dream of Bunny Girl Senpai" and Rascal Does Not Dream of a Dreaming Girl" Written by L.O. B. and R.M.M. Cover Art by: https://www.facebook.com/CsArts18