Souda Bakkure You Dorei Kattara, Zense no Joushiki toka Rinrikan toka Doudemo Yokunatta

https://www.cmoa.jp/title/321916/ Stella was reincarnated with memories of her past life, where she died from overworked. as a child, her brilliance made her a prodigy, but by age 18, she's just an ordinary employee in a black company - forced into 15-hour workdays, 29 days straight, while enduring harassment form her boss and bullying form colleagues. Desperate for comfort in a world without her beloved 2D characters, she has a wild idea: buy a 3D one. She purchases a tall, handsome slave named Elias. But what exactly does "servitude" entail? (ArtLapsa)