My Girlfriend Cheated on Me, and Now My Flirty Underclassman Won't Leave Me Alone (Manga) Vol. 1

After suffering heartbreak right before Christmas, one man could get the gift of love after a run-in with a cute girl dressed as Santa in this shonen rom-com! The manga inspired by the light novel, also available from Seven Seas. When Hasegawa Yuuta discovers that his girlfriend has been cheating on him just days before Christmas, the holidays are looking to be a lonely time for the newly single university student. But when he crashes into his mischievous underclassman, Shinohara Mayu, dressed in a sexy Santa outfit, his life is thrown for a loop. How can he grumble about his broken heart when a cute girl insists on invading his personal space?