Saku and Yukichi receive invitations to Yume's birthday party. Yukichi convinces Saku that it'll be completely fine to attend since it'll be a costume party. However, will Saku and Yukichi really be able to fool all the parents and children there?!
Wait, little brother?!
Moment … I-Ihr kleiner Bruder?!
U-Un momento? Ha detto "minore"?
Espera, irmão mais novo?!
Стоп, он ваш младший брат?!