A married woman secretly seduces me in the library

Yuta is a university student who secretly admires Aki, a married woman who works at a library. He's paid close attention to his girlfriend, and is encouraged to join him and recommend a book... Yuta is confused by the perverted sexual content. However, Aki, enjoying his situation, started to provoke him even more. He then whispered to Yuta, who was still there when he was closed, "Don't you want to know the continuation of that book?" and toyed with him. The innocent Yuta couldn't resist her lewd invitation, as she ravaged her body with such a rapid pace...