There's no all-age version for english according to VNDB, and yes its just translated few days ago and yes its smeagol(?), and yes its blood-related incest, and yes your sister is the only heroine here and yes, this VN contain ugly shit like heroine death, mind control and betrayal (since its kinetic novel, you'll see them all)
While the summary could hint at dark undertones, (Though I've seen comedy animes with similar pretense) the pictures used are very misleading, then. Lmao!
In the past, SEGA had a disciplinary room called the "Pasona Room," where unproductive or delinquent employees were locked up and managed. Hitoaki quit the company to escape because he was about to be sent to the Pasona Room.
and yes its just translated few days ago
and yes its smeagol(?),
and yes its blood-related incest,
and yes your sister is the only heroine here
and yes, this VN contain ugly shit like heroine death, mind control and betrayal (since its kinetic novel, you'll see them all)