Typically the point of view character for Tokuno Yuika's series I Want to Cure my Little Sister's Bratty Behavior!, who never fully appears on-screen.

Character's profile from the first collected book:

Age: 19
Birthday: May 2nd
Height: 179cm
Weight: 68kg

A first year college student. Also an at-home web systems developer.
Always took care of his little sister in place of their parents, who both worked.
Because he dotes so much on his little sister, he eschews studying in favor of focusing on work so that he can support their ability to live together.
He used to be into games, but it fell by the wayside due to his job and housework, so cooking has become his sole life's work recently. Reads haiku and senryuu.

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