Kanojo ni Uwakisareteita Ore ga, Koakuma na Kouhai ni Natsukareteimasu

Synopsis:

Christmas season. Hasegawa Yūta ended up single in the wake of separating last month when his better half had undermined him. Furthermore, it was a couple of days until Christmas! After a regular discussion with his female companion, Mino Ayaka, Yūta met a lovely young lady clad in a St Nick suit — In a path loaded with couples no less! Her name was Shinohara Mayu. Will this experience with Shinohara end up being the Christmas present for Yūta?