i cant find what anime this is

so i dont have any pictures i only remember this vaugely. its like one guy is a vampire and the other guy is normal and for some reason they get into an argument and arent talking to eachother, but soon they sit next to eachother on the bus because there is no more room??? i cant remember, and then the vampire guy falls asleep and accidentally slides over to the other guy and his teeth get stuck in his skin and he panics and starts screaming at the vampire guy to get it out... i dont know if im crazy or what i dont even know if this is a real anime