The writing is pretty stupid and cringe, I like it a lot though. Replayed to check out the Koga choice and ehh no. Cheating is best when it's more organic, not when she's forced into starting it.
But kissing her after non-violent swinging for a "+1 cheating" gives me hope.
My ideal is that Akane can, of her own volition, give her virginity to someone else while still in love with the protagonist. We'll have to see, I guess.
I think the sister relationship is an odd one. There's 0 incest vibes. She just comes in after years and is craves MC's cock. Though I give it points for novelty I guess. No taboo or weight to it. It doesn't bother me, but I feel like people into incest might be let down.
I didn't know anything about anyone at the start, so the choices bite a lot. No clue if I'd like any path of any other, or dislike them, until I try. A lot of scenes you miss out on to see another. This is good or bad depending on someone's preferences, having choices that actually matter besides "this is objectively and obviously right" vs "this is obviously wrong" like so many other VNs is a real perk for someone to consider. Mixed feelings, myself.
Too early for me to rate. I can try to project out how I think this will turn out in future updates, but the end of the current one doesn't fill me with any confidence in the slightest. Still, I want to give it a chance and see if it surprises me. I'll wait longer.