Since I'm Not Popular, I'll Put On Airs

WATAMOTE ~No Matter How I Look at It, It's You Guys Fault I'm Not Popular!~ – Season 1

Tomoko's mother tells her that her middle-school-aged cousin Kii-chan is coming to visit. Since Tomoko always acted the role of a smart, popular girl in front of Kii-chan in the past, she starts to think up ways to keep her cousin from finding out that her stories about her boyfriend were all lies.