Kou met Narumi in the middle school that he transferred to, in his mother's hometown, Nagasaki, during the second term of his first year.
He initially found her to be a kind and a friendly person, because she helped clear up misunderstandings with their classmates about Kou's surname, "Mabuchi", and his parent's divorce, when he had trouble opening up to them.
They then become an official couple and meet at their promised place for a date.
Surprisingly, Kou swallows his pride and buys Yoshioka flowers, because seeing her smile is more important than being embarrassed.
In middle school, he looked more innocent, but as the years past he changed into looking more mature and serious.
He tends to keep more of a straight face and his expressions make it hard for people to read what he's thinking, especially Futaba.
Despite Kou's obvious feelings he shares with Futaba, he never fails to tease her about wearing make-up and how unfeminine she is.
Kou lightens up more around his new found friends such as Futaba, Aya, Yuri, and Shuko.
In addition, he has extremely pessimistic views about himself and about his brother.
Despite these changes, it is evident that Kou is still an overall kind person.
Walking down the street, at a café, at work, at a party…
Discover the people you’ve crossed paths with the people you like, the people you'd like to find again.
When he entered high school, he is bothered by the fact that Futaba keeps comparing his new self to the old one she knew back in middle school.