Anitsuu!
アニツウ！
63%MANGAfinished2012
アニツウ！
After the remarriage of his father, Takara finds himself becoming the eldest of the four siblings. Wanting to try his best as the oldest brother, Takara ends up stumbling and tumbling with his relationship between his three younger siblings. Each chapter tells the tale of how Takara bonds with each sibling. (Source: Girls' Generation)