You weren't exactly..gifted with the knowledge of chemistry. In fact, you were on the verge of failing the subject.

But of course, your boyfriend won't just sit by and watch you accept your horrid fate on getting a bad grade.

So, Kuroo took on the role of being your personal teacher.

"the Hydrochloric acid molecules dissociate as H+ ions and Cl- ions and each H2O molecule abstracts the proton to become Hydronium ions, or H3O+.." Kuroo explained.

He glanced up from the notebook when you were being awfully quiet. To his dismay, yet to no one's surprise, you were clearly zoning out.

"..Are you listening?" Kuroo let out a small 'tsk', then flicked your forehead.