I was about to make a review but this game is so fucking stupid it's gonna end up being a very long joke to read.
My first thought was, Sister (that's her name, not her family relation btw - Imouto means sister in Jap) gets the key to the house in the morning after the prologue which occurs the evening before.
So, instead of going straight to school, she jumps into her time machine and unlocks the house door yesterday so she can get inside... because MC found the door open, but not broken.
Also, in Japan, the night sky is bright as day. And sis wakes up early (it is clear daylight outside, making this a summer game, but with school).
Also, daddy is not afraid AT ALL to send his daughter, the little tiddy-bae to a sex crazed monster (who didn't remember that he has a sister), at all. He is afraid of her going to a mixed school and sends her to an all-girl school in MC's city, leaving himself the EXACT FUCKING SITUATION.
And MC even says/thinks, "I'll make her a woman". Then I think, "yes, in five different positions, in the bath, and doing the tiddies". Where are those scenes in the gallery, by the way???
Sis has no voice. In fact, she even lost the ability to breathe light or heavy, to moan or pant. She speaks in dialogue fields during chat, but in bubbles during sex. Maybe they're speech-cumbubbles.
Also... hypnosis has to do with the ability to click a mouse button at the FUCKING EXACT RIGHT MILLISECOND.
These are the scenes (that I know of) that are missing from the gallery (from DLSite). They are the same one-second animations as the rest of the game:
