Mayaka-neesan wa Uso ga Tsukenai

Junya is a third-year junior high boy who is good at sports, but not so good at studying. Recently, he's got a new problem. Mayaka-san, the older sister of his childhood friend, has been picking on him and teasing him a lot! Does that mean...... she likes me!? The start of a deceptive romantic comedy where the protagonist is constantly being bamboozled by a tricky girl!

(Source: Magapoke, translated)