Okay, so this review is for 0.33, which I found online. Appareantly the game is at 0.7 on patreon, but I feel this needs to be said.
The male MC ruins the game. The writing for him is terrible, and he only exists to add extra dialogue. I played both routes, and I'm 100% certain he should not exist. I even renamed him Kana and swapped character images to check, and I'm certain of the following:
Kana should be the only first MC. The game should be Futa x Female Harem Corruption. When Kana takes Jack's place and nts and ntr events are mixed, the story is much more consistent and has better pacing. Having one single route where Kana gets into helping Sayako corrupt the other party members gives nts vibes, but at the end of the day is a harem game which is the whole point.
Starting at Eversea, Kana and Sayako can be swapped as the mc for some events, and the date would be mother-daughter Alice/Kana bonding. Basically, the original bonding would have Sayako as mc, then after Anna scene it switches to Alice on the beach.
When this is done, Kana is corrupted, Ayako resists a bit but gives in midway, Kana becomes a voyeur, 50% of fluff dialogue that ruins pacing can be cut, auto scene will be default (no needing rec room), and so on.
In addition to this, all areas should be condensed (maps are too large) and turn based combat shpuld be replaced with one press overworld kills; there's already a slashing animation for this.
TLDR Story should focus on Kana and Sayako as mcs, Jack should be erased, Kana should be voyeur, and all relationships corruption/harem, not vanilla.