The animation here is pretty much none, most shots are a single image focusing on respective parts (aka her breasts, face, pussy). However, if you managed to initiate sex with her, there is a very limited animation, just essentially two frames for pistoning. If you ever played his other game sister travel, it's like the animations for the sex scenes you see in those.So, does this one have animation in it at all? I really liked Inusuku's older works for their fluid animations, seems like they've been steering away from them over the past few years...
Spending no money on the extra food selected will result in the imouto probably preparing dinner for you. Theres no prep time involved, you'll get 5 energy back, but at the cost of lowering her affectionI can confirm the 3000 yen food option refills your stamina by 20, and also refills your, ah, "other" stamina counter by 1.
(You lose 5 energy while travelling from the stores and back home though!)
Like Nelath mentioned,
The 3000 yen food restores 20 energy and 1 ejaculation count. I'd like to add that it takes 1 hour for the imouto to prepare dinner though.
The 2000 yen food option gives 10 energy, but instead the imouto doesn't take any time to prepare (i assume you either bought the dinner so she doesn't have to prepare it,or it's some other reason.)
The 1000 yen food option restores 15 energy, and has a 1 hour imouto prep time.
Note that eating dinner will take up half an hour of time, no matter what.
Spending money on the food will probably slow her affection loss. (I've never seen it raise her affection though)
When you take the imouto to the shopping trip sat/sunday, selecting the 2nd option is what i assume to be buying workout gears and what not. 2 of the three options in this category offer a 1 time boost to your stamina. 20k yen option will boost your max stamina by 5, and the 100k option will boost your max stamina by 10. I bought the 80k and didn't see any change to any of my stats.