I can still remember the woman who promoted this animu for Kadokawa USA (before it shut down). Her finding out that people saw this before, and her verbal bewilderment over it, made my soul laugh out loud. I call "ignorance" on it; 100%
With that being said: Maybe this animu would've been better if it had a sense of consistency; keeping Takuma blind and having Otoha possess the warthog...
But you know. This animu is based on a visual novel; an eroge. And expecting anything more from anything based on visual novels and eroge (like SEX and atleast two scenes of people having SEX with each other) is what I've been learning to NEVER do again.