It's a hot day in the research lab, and the narrator is having sex with a childhood friend. He's not sure what's going on, but he's pretty sure it's because the friend is a little sister of the narrator's boss. The two of them end up hooking up, the narrator says, because they're BFFs. The narrator doesn't know what to make of this, so he tells the guy to go back to the lab and explain himself. The guy says he'll be back soon, but first he wants to know what the girl is doing at the open house. The girl is more like a sister, he says, and they seem to be friendly, though the girl isn't as cute as the girl he was with the other day. He asks the girl if she's fighting with the guy, and she says she is, and he says she was fighting with him, too, and that he'd better come back and explain what happened, otherwise he won't pass his exams. He wants to hear what happened that day, but the girl says she didn't want to get into a better school, so she just wanted to hear about what happened the day before.