She is the secretary and treasurer of the student council.

On his way to school Junichi Nagase saves a girl from danger. Later due to a misunderstanding he kissed her. Shocked and disgusted, and without understanding what just happened or why, she screams at him and tells him to "just die!" As it turns out, the girl, Yuuhi Katagiri, is a new transfer student and, much to the surprise of Junichi and his younger sister Minato, their father arranged for Yuuhi to be Junichi's future wife! Of course, getting married to "that perverted idiot" is the absolute last thing Yuuhi wants! Junichi's crazy school life with his tsundere bride-apparent has begun!<br><br>
(Source: Animesuki, edited)

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Everybody goes on vacation to Ayanokouji's private island for fun in the sun. Hilarity ensues.

Jun'ichi Nagase attends a prestigious high school. He has the nickname Geno Killer since he was rebellious in middle school. This is used, inadvertently, to help a girl named Yuuhi Katagiri from trouble. She later transfers to his school, and in order to protect Yuuhi from danger, Jun'ichi is forced to kiss her. Not understanding what happened, she screams at him. Subsequently, it turns out that Yuuhi is his fianc&eacute; as arranged by their parents. Their parents discuss the matter and order them to go out together for a month to restore their relationship. If their relationship does not get better, the engagement will then be canceled.

Aya Nijou