A Condition Called Love 2 by Megumi Morino

Hotaru doesn't need a boyfriend. But an act of kindness to a classmate going through a breakup opens a door she never thought to step through, in and everything begins to change... A sweet new shojo romance manga from the creator of Wake Up, Sleeping Beauty!

ALL I WANT FOR CHRISTMAS IS...?

Romantically ambivalent Hotaru has found herself going out (on a trial basis) with Hananoi-kun, who is too romantic for his own good! The plan is to end the trial and go their separate ways on Christmas Day...but Hananoi-kun just gave Hotaru the happiest Christmas Eve of her life. Now, with the deadline just hours away, she isn't so sure she wants this to end...