@DevLogger You're forgetting MC's family is ridiculously rich. Her father wasn't treating him like a costumer...he was treating him like someone at a much higher social standing him. Like a peasant/villager toward a Samurai or Feudal Lord. Hell, I wouldn't be surprised if MC's family did have some kind of history like that.
@Kami_Nana: Err, perhaps I worded that strangely; the 'store location' part was in relation to where Rena had wandered to, not that Gin was a customer. But yes, I neglected to note the profuse bowing, though since they are neighbors, I figured Rena's father would address Gin with at least a surname.
@Hachi015: Aha, I had realized that not long after I'd posted to you. I've read all the chapters here, pity that there aren't more; the story is funny at times and also tugs at the heart.