Cyber Rabbit by Yamatogawa
In the future, machines allow people to enter a matrix-like reality where all their wildest fantasies become possible. But Ryu realizes it's not all fun and games when his girlfriend becomes addicted to the idealized versions of herself she is able to produce in the virtual system and refuses to even meet him in reality any more. luckily, he devises a plan to restore her confidence, even if he has to force it on her....
