第 1 集: 齋藤風花回憶起與哥哥光約定結婚的童年承諾，同時應對校園謠言。

1

Fuuka Saitou makes a promise from two years ago to marry her brother named Hikaru Saitou once she grows up. Fuuka's popularity in school attracts the attention of Natsu but she shockingly learns from Rin Fujisaki about Fuuka's nickname. Fuuka consumes milk and a banana but her actions make Hikaru uncomfortable. Fuuka bakes a cake for the first time for Hikaru. (Source: Wikipedia).