I think you should take some time to think about your feelings for her. Maybe it's a wake-up call that the relationship wasn't as solid as you thought. You could also consider seeking advice from friends or a professional counselor to help you process your emotions and figure out the best way forward.
Often, these manga have a MC who easily overcomes challenges and has extraordinary powers or abilities. The plot might focus on their dominance and conquests.
The characteristics of cartoon buses can vary a lot. Sometimes they are shaped really strangely, like in the form of animals or fantasy creatures. They often have friendly and inviting looks to attract kids and make the image more fun and charming.