Aniki ga Koi wo Hirottekimashita

Even though Makoto is only a middle school student, he's the one taking care of his airheaded older brother. One day, Makoto arrives home from school to find that his older brother has picked up a suspicious man from the garbage dump. And even worse, it seems his brother has fallen in love at first sight with this garbage dump stranger!

(Source: xiaojiangworld)