The 22-year-old MC starts his senior year of college as an intern, and because his mother's best friend is going to work abroad, he is... more>> asked to help take care of the 11-year-old brother who is attending school in the same city. From then on, a mature and vicious primary schooler and a gentle and stingy older brother live together, because they played together when they are young, the two got close quickly, starting a hilarious and heartwarming life of living together. Although the two have no blood relations, they are closer than relatives. <<less