[Ichigo makes sure each bowl has an equal amount of rice and stir fry, then takes them to the table. He does his best to not laugh at the two bottles. But he does reach for the lemon juice first.]

This is called lemon juice. It's incredibly sour and acidic, so not great for drinking. It can be used to make things or to flavor things, but you wouldn't like it on its own.

[Reaching for the other bottle, he opens it and pours a bit into each of the glasses.]

This is sake, it's alcohol made from fermented rice. This is a drink, but if you've never had alcohol before, you'll want to go slow with it. Alcohol alters your brain in ways like messing with your balance, causing your reaction times to be slower, it can impact your judgement, and even make you slur your words. But it can also make you feel warm, happy, silly, and a little clumsy.