Suzume's boyfriend. A strong boy born to distant parents, Kazuya became a delinquent and a loner to such an extent that, feeling useless, he contemplated suicide. In an attempt to drown himself, Suzume stops him and helps Kazuya learn to appreciate life. He then determines to live strongly. He deeply cares for Suzume and spends lots of time with her; the always cheery personality that is sometimes found annoying by her peers is what he likes most about her. He "marries" Suzume by crossing a river with her, symbolizing their willingness to face any obstacles in the way of their relationship. It is revealed later that Kazuya is the top student in his grade (as well as best-looking) and was accepted into a prestigious school.

[source: Wikipedia]