SWAMP STAMP Anime Edition

Synopsis

Nishina the innocent girl who wondered what it was like to have sex. Finally he decided to try sex and release his virginity to the guy who experienced in his school that is the Hashimoto. However, a disgruntled and boring feeling, makes it to try with another man. What will happen with Nishina later? (Source: Nekopoi and Has Been Translated and Edited)