A story of Kazuki Nishizawa, Ayumu's younger brother, is told how he met Nagi and fallen in love with her. Maria explains how Nagi developed an inferiority complex due to her short height causing her to frown most of the time. Nagi walks alone to Wataru’s store and rudely remarks that he is short too, Kazuki follows her. Kazuki confesses to Nagi about his love for her and asks if he is able to take Nagi on a train ride, though it becomes a date. In the end, Kazuki says that they should do things like this again...