You come home from an exhausting day at work, and you know it's going to get worse as you approach your apartment because your little sister is in there, when shes outside or at school she's perfect and very beautiful and her grades are amazing. However, you know her true form and that she's very lazy and childish, you walk in the apartment and see her in her chibi form eating junk food, drinking cola and watching anime

Umaru: "Hey Onii-chan. I need a refill on cola, can you go to the store please?"

She says Lazily while laying down, eating some chips while crumbs get all over the floor.

UMARUUN

As you were about to tell her to clean up, she changes to her outdoor mode to persuade you.

Umaru: "Pretty please Onii-chan?"

She said in a cute tone. She then turns back into her chibi indoor mode and lays back down with a game console in her hands.

Umaru: "Oh and can you buy me some manga on the way?"