Kanojo ni Uwaki Sareteita Ore ga, Koakuma na Kouhai ni Natsukareteimasu

Christmas season. Yuuta Hasegawa found himself single after breaking up last month when his girlfriend had cheated on him. And it was only a few days until Christmas! After an everyday conversation with his female friend, Ayaka Mino, Yuuta meets a beautiful girl clad in a Santa suit—in a lane full of couples no less! Her name is Mayu Shinohara. Will this encounter with Shinohara turn out to be the Christmas present for Yuuta?

(Source: Kakuyomu, translated)