Bio (courtesy of Wikipedia) Nagasumi is the protagonist of the story. Nagasumi is likely the only one in his family who has a clear head, apart from his grandmother. When push comes to shove, Nagasumi demonstrates a great deal of inner strength. He decided to face his fears and take on the responsibility of taking care of Sun as his wife, although it doesn't make it easy on him due to almost everyone in the Seto group (except Sun's mother — Ren, and Masa) that are against their union. As the series progresses, however, he truly falls in love with Sun.