I'm looking for a certain BL manga I read a while ago. I don't remember the name or artist at all and it's been bugging me forever. I was thinking of recommending it to a friend, but I couldn't haha. The story is about a short high school boy who eats a lot of snacks and his friend, who knew him since he was little.

I think the story starts off when the shorter boy, he looks to young to be in high school, is failing his class and the two start to study together so that he won't flunk. Some things happen and the short boy finally passes class. I think there was also a chapter that explained how they met. The short boy thought that his friend was an alien and that the alien was trying to destroy japan. So he taught of some crazy idea to beat the alien. Then in the next chapter there is a competition of some sort, all I can remember is them doing a three-leg race and a team race. I distinctly remember the short boy jumping up to grab the bread when the rule was that they had to use their mouths to get it.

I'm not sure what happens after that, but hopefully that was descriptive enough?