Winter With You

This Christmas night was supposed to be special for Naoki. He decided to surprise his girlfriend Miyuki - he bought a bouquet of flowers and booked a restaurant. But when he went to her office, he saw Miyuki cheating on him with another guy. He immediately ran out of the office in anger. In Central Park, he meets Yume, a young guitarist who, like him, has no one to spend Christmas with. Her cheerfulness distracts Naoki for a while. But running away from the problem is not the solution.

[From Steam]