Female Spy Undercover Investigation: Holy Sex Academy v1.0 by nullnullfullido - Adult Sex Game

Overview:
A clueless female spy undergoes sexual development and training in this exciting infiltration RPG!
Our protagonist, a female spy named "Mashiro," was born with a body that cannot feel sexual sensations due to a secret technique passed down from her family.
Since she is invincible and oblivious against all things sexual, she regularly achieves overwhelmingly positive results in both erotic training and erotic combat.
However, when she infiltrates an educational organization, the "Academy of Erotic Arts," her insensitivity seal is removed by the enemy leader!