Mayaka-neesan wa Uso ga Tsukenai

Junya is a third-year junior high school student. He's good at sports, but when it comes to studying... well, let's just say he's really bad at it. Lately, he's been troubled by something. His childhood friend, Mayaka-nee, has been messing with him in all sorts of ways! Could it be that she actually likes him...?