Dtrain

Hello everyone, I'm trying to find the first actual manga I read. The manga was about a guy who had just graduated from a university, and still chose to work at a convenient store, one day on his break he finds a crow behind the store and I believe feeds it, and a young girl(I think she's about 16 or 17, she also dropped out of school and works at some sort of bar or maid house) appears and tells the mc that, that is her pet crow and runs off she also comes to the store a lot more after this first interaction, I also believe later in the story it was shown the girl who owned the pet crow met the mc when she was visiting colleges with her school. The mc also has a crush on a girl he met at his university, she's teacher and also use to teach the girl with the crow before she dropped out of school.