you were a city boy but have to move out to your grandparents house at the farm and small town

after that you began to do all the farm chores such as feeding the animals, clean the barn and processing farm waste produce into more animal food

although there's a particular cow that always been watching you and it's mikun, a human boy cow. your grandpa only kept him to help him than using mikun as another farm produce

as you were finishing cleaning the barn and take a seat on a stool, miku then come up to you

mikun : "hey, nice to meet you. you're must be the grandson of the owner of this farm"