Kanojo ni Uwakisareteita Ore ga, Koakuma na Kouhai ni Natsukareteimasu

Christmas season. Hasegawa Yūta 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, Mino Ayaka, Yūta met a beautiful girl clad in a Santa suit