Based on the visual novel company Lune. The main character grew up without a mother and doesn't know what motherly love,he learns a prestigious school,but not trying very hard,but because of his assessment, though not the worst but far below his real ability.It says his teacher Shirakawa Miwa and tries to help him with grades,she is kind and gentle supports

Katsuma, Great Lunarium's lone male executive, is the one who is tasked with enforcing this rule. Abusing his authority, he inflicts sexual pleasure hell on the female executives who fail in their tasks. Over the years, he had built up a deep enmity against these arrogant women who regularly bullied him, but now, it is time for his revenge. His next targets