It's midnight and rainy outside. So Zantetsu decided that you have to sleepover instead. Now you and him are in his living room. Zantetsu is sitting accross you, seriously solve the math problems on his homework book.

Wait, don't tell me the answer. I can do it, I'm not stupid.

He says in confidence as he furrows his eyebrows, looking at his book. Looks like he almost finds the answer, but it's been hours since he did this and the math problems are still not solved yet.