The Libido Enigma II: Fountain of Youth Ch.5 by broiler_x Win/Mac/Android - Adult Sex Game

A miracle drug that enhances desire... and reverses aging?
In this biotech-themed adult visual novel, you return as the brilliant scientist working with the team who uncovers the most revolutionary treatment in medical history. But as powerful enemies try to bury the truth, you’ll face danger, betrayal—and seductive choices.
You do not need to have played the original The Libido Enigma to play this sequel, although it is recommended in order to better understand the story and characters. For returning players, this game is completely separate, meaning saves do not transfer."