Text based means there would be barely any picture, and what you're making seems more like a visual novel kind of thing. So i think you should not use that "text based" tag as it is misleading.
I liked the nurse tan marks on a rather pale skin, that's a nice touch, but maybe make her untaned skin less pale because no skin is labcoat white. I mean if not for the labcoat it would be fine, so an alternative could be for the nurse to have a light pink outfit or another pastel color.
Maybe don't have the grandmother wink when she leaves early on, that's a bit weird.
Description of the MC's mother's house by Anna is beyhond mecanical, maybe flesh out the description of each room.
Supposedly the MC would have his father's last name, so the mother of his mother would have a different last name. Hence she wouldn't be called Miss Smith during the talk between her and the doctor. Or the MC wouldn't be called Eric Smith.
There is a timeframe during the first morning you spend at your mother's house in wich the MC supposedly talk to Anna, but Lilly is displayed instead. Maybe that's something you should correct.
Owner of Sofia's coffe says her name is Sofia, but the displayed name is Emma. Guess that's a small mistake.
In most tales cuming in a succubus => instant death
In some tales (including the bible) half angels are called nephelims and are more akin to demons than to angels. According to those tales angels were not supposed to fuck humans and god didn't like having his plan screwed up. Funilly enought this was written in the old testament, before God was considered an all knowing all able being. The make up for that ended up being "He knew and at some point the fallen watchers and nephelims will have some use.". Just saying if you want to incorporate more religious background in your projects. I saw you made your own universe religion background and that's totaly fine too. It might actually be better that way.
Finally your english is a bit approximative. Don't get me wrong, you're good enought for comprehension not to be an issue. But sometimes it feels like you're trolling and it could get on some people nerves, so maybe have your texts proofreaded. It would increase the global quality of your work and allow you to avoid mean comments wich may be detrimental to your wish to keep going. You may even find volonteers willing to help you with that for free if your game is good other than that.