Kanojo ni Uwaki Sarete Ita Ore ga, Koakuma na Kouhai ni Natsukarete Imasu

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!
A few days before Christmas, college sophomore Hasegawa Yuuta learns that his girlfriend has been cheating on him. Dejected and alone, he’s evading all the happy couples celebrating the festive season when he suddenly bumps into Shinohara Mayu, a beautiful girl in a Santa outfit. It doesn’t take long for her to start finding the fun in teasing her gloomy senpai, and soon, she’s finding any excuse to spend time with him. What began as a miserable start to the holiday season is quickly becoming a Christmas worth remembering!

[From Seven Seas Entertainment]