Yomi Ecchi! ~Honzuki de Mousou Kei na Senpai to, Otokozuki de Koakuma Kei na Sensei, Demotte Boku~

Shougo is a male student who is interested in sex at his age. But he is a virgin. He uses pornography he borrows from his best friend, and handles his excessive sexual desire on his own.

Shougo has been in love with Shouko the older sister of Marina, his childhood friend. He's been in love with her the moment he saw her all those years back. In order to be as close as possible to Shouko, who loves to read, Shougo started reading books himself.

They enter the same school and become members of the same library committee. Shougo thought that he didn't need to be Shouko's lover, he just needed to be close to her. however, Shogo's everyday life is changed by a woman. Hijiri Agatsuma, the school nurse at Shogo's school.

It all started when Shogo approached her at the observatory.Hijiri, who had just been dumped by her boyfriend, drunk and in a fit of desperation she takes Shogo's virginity and a peculiar relationship between the 2 blossoms.

Shougo while saddened by this continues to do as he is told by Hijiri, simply because it feels so good. Then Shogo and Hijiri happen to learn Shouko's big secret. Shouko's favorite book genre is erotica!

Her innocent appearance is actually a whirlwind of naughty fantasies! Shouko is made to read sensual novels in front of Shogo and Hijirii, and as Hijiri puts her through the paces, Shoko finally gets together with Shougo...!

[From official site]