An Older Guy's VR First Love Vol 1

From the Vertical edition

“Farewell, my last and final lover.” Naoki is forty years old, single, male, and a temp worker. But in the world of VR, he takes on the form of a lovely young girl. There, he meets his first love—the cheerful and beautiful Honami. Real life, for Naoki, was a failure. The VR world where he escapes to is coming to an end, too. But in those final moments, he finds her... 16+

Source: Penguin Random House API