Love Status: Simulove

Rain is forced to make a firm decision when, out of nowhere, her long-time boyfriend Jess confesses that he's seeing another woman, Mesa. Jess asks for a chance to be with both of them at the same time, but Rain refuses and chooses to break up with him. This leaves Jess under immense pressure, ultimately leading him to take his own life.
Overwhelmed with guild, Rain begins to cope by recreating Jess as an AI through a personal assistant app—one that feels completely real—to make up for what she believes is her role in his death.
Eventually, Q, Rain's old friend and another man connected to Mesa, steps in, trying to pull Rain back into reality before she loses herself completely.
(source : mydramalist)