Visual Novel game with incest and timetravel

Swazdula

Newbie
Apr 1, 2019
63
36
I downloaded the game a while ago and just remmebered it, wondering what came of it so far (without remembering the title)
The game started with a male protagonist waking up due to the arrival of his childhood friend (girl with grey/white---ish? hair). She raves on about the mc's sister (also rather light hair).
I also remember a part where the mc comes home from school to see his mother and her friend doing yoga (where you have the option to flirt with both of them), followed by an encounter with the sisters friend (brown hair, a shirt with one arm in nets), said friend had a one night stand with mc before the plot.

Overall arch (so far) was that the father went missing during a lab-accident, which the mc gets involved with after finding out about more details at school. he finds the hidden lab in a sewers-like system, then a machine, which activates when he gets called by his childhood-friend. the first part ends with him finding his home back in 1980(?) where he sees his mom (now a teen) dance with a friend.

The game is entirely in 3d renders with animated parts.
Help on this pls