Kuyashiikurai, Suki.

Spanish:

Esta historia gira en torno a dos estudiantes que se conocen desde la primaria; Kojima Arata, un jugador de basquetbol, y Lena, una chica arisca que no entiende mucho del amor. ¿Pero qué pasará cuando Lena descubra nuevos sentimientos hacia el chico que ha conocido por tantos años?

English, From Chibi Manga:

You're making my heart beat all alone stupid. The unfriendly girl, Reina is a first year in high school. Because of her childhood friend, Kojima Shin, she became the boy's basketball manager. He was like a small brat when they were in elementary school, but not he's gentle and so cool. But there's a Senpai who he looks up to. But I can't seem to stop falling in love with him…!?