Hyouka dj - Chitanda Shojo Soushitsu

From Little White Butterflies:

Mayaka Ibara, out of pride and jealousy for Houtarou, searched for the meaning of “Hyouka” by herself. Though she succeeded, the search for truth brought terrible consequences. In addition to “losing” her mind and having her virginity taken by a fugly NEET, she became a slut who wants nothing more than cocks. Not only that, Mayaka’s actions had drawn in another curious kitten, who like her, will be broken before false illusions…