I am in love with him (Yamazaki Sousuke x OC)

Yamazaki Sousuke is a tall, well-built young man with the age around 17-18, studying in the Samezuka Academy. He always seemed to have a serious facial expression on, always going hard on himself until he met a certain someone. This is a Yamazaki Sousuke x OC fanfic, long or short, it'll depend on how well my imagination goes.