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Kai Masaki

KaiV

Continuity
Age
15
Gender
Male
Species
Human
Relatives
Yoshiko Yamada (future wife)

Kiriko Masaki Jurai (sister)

Seina Yamada (Brother-in-law)

Kai Masaki is Kiriko's younger brother, as well as Seina's best friend. He was the one who often fixed (or constructed new) bicycles that would be wrecked as a result of Seina's bad luck. 

At the end of the series, it was learned Seina's sister Yoshiko was to soon be Kai's wife.

Kai2

Yoshiko and Kai in Love!

 

Voice credits