Yuu Minaduki's The Little Bird Sleeps By The Sea is an excellent example of the type. The story follows Yuuichi, who adopts his young nephew Ayumu after the rest of the immediate family is killed ...

Also: Merry Witches' Life, Kou Hirokawa's We’re Not Cut Out to Be Lovers Left devastated after the tragic death of his parents and sister, Yuuichi Tachibana adopts his seven-year-old nephew ...