[That - something feels off. Micchy follows after his brother, watching him carefully.]

I can take care of homework later. I want to help you now. It's not just you who can take care of me - I can help take care of you, too.

[Maybe it's a little pushy, but it's true. There are ways in which he wants to surpass his brother, but that doesn't mean that he doesn't want to care for him, too. They're family, after all.]