The story begins with by stating how Eirin has given Yuyuko a yukkuri Reimu as a present, which she has specially modified to have a high reproductive rate. Yuyuko treats the Reimu as livestock, but Youmu objects. Youmu asks Yuyuko to have mercy for the yukkuri, to which Yuyuko comments that they are merely "delicious things". Yuyuko is then seen feasting on the first batch of koyukkuris, and comments that the portions are "small, but they taste great!". However, the Reimu has not only been enhanced physically, but mentally; giving it the thinking ability that a natural yukkuri would never have. It "suggests" to Yuyuko that she should grow the koyukkuri for a fortnight, provide the best care, playmates and feed, to which she agrees. Youmu is the one who has to take care of them, however. A