To be honest, Yuuko Kyouko-san is the far superior choice here. And it's not like there's anything wrong with cousins, perfectly legal in most of the world.
Ah, so that title is a variation on 'notice me Senpai', eh? Yeah, when Senpai won't notice you, you just have to make him look your way forcibly!
"Sounds like she has a crush on you"? Yeah, it's just that she's a bit of a tsundere. I like how his friend basically deadpans asking him out just to rile her up a bit. What a wingman!
She's also quite the schemer. She knew that he'd go after her so she lured him to her house...Though when he wouldn't do anything she just went with the full frontal approach.
Great ending though. Heh, I really like how straightforward his cousin is. Like, she just straight up asks if they did it after she proclaimed that Senpai was hers...