Pure succubi are the best! Can't wait for the other two games to release; brown hair girl on pg15 is one of two heroines in the second title, and the last title features a dorm manager/maid. All heroines are succubi and MC is able to bone them because of his enormous vitality/life force.
I hope we see more titles feature pure succubi, they are like the fantasy version of pure gyarus!
Lastly, it's kind of a shame that pink hair's mother wasn't given a sprite and at least a token oyakodon scene. Mami's mother runs the school that she and the other succubi attend. They even gave her a first name (Eimi)! Also it was kind of lame how they only used the x-ray/internal cumshot in a single scene... we even got heart-shaped pupils, where's the x-rays at?!?