深冬が人慣れするための友達になったさとる。連絡先は交換したが、案の定やりとりは生まれない。そんな中、深冬が管理人室にやってきた。覚えのない荷物が置き配されているということで彼女の住む５０３号室まで一緒に様子を見に行くさとる。調べてみるとそれは誤配。出荷元の通販サイトから処分してほしいと言われたさとるは、食べ物だったら一緒に食べましょうと気軽に深冬を誘ったのだが……。
Satoru becomes Mifuyu's friend in order to help her get used to being around people. They exchange contacts, but as expected, no communication followed. Amidst this, Mifuyu comes to the manager's office. It appears that a package she didn't recognize had been left at her doorstep, so Satoru joins her to check on it at her apartment, Room 503. Upon investigation, it turned out to be a misdelivery. Told by the online retailer to dispose of it, Satoru suggests to Mifuyu that they might as well open it, but…
