Otomine Yuuna, a talented painter, was Yasuna&#039;s boyfriend until one year before the beginning of this story. He never was clear about what exactly Yasuna meant for him.  

Seventeen year old Nakaido Hirosuke is just your average high school student. One morning as he arrives at the train station on his way to school, he catches sight of a beautiful girl, Ajimu Yasuna, and immediately falls for her. The two of them get to know each other and become friends, but he can't confess his feelings and she is unsure of hers. As events and other people present obstacles for the potential couple to clear, their relationship begins to develop and their feelings become clear.<br><br>
(Source: Anime News Network)

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Otomine Yuuma