both leads in both shows are childhood friends. i found both of the shows to be very healing and comedic as well.
both fls face similar situations of exhaustion and making rash life decisions all at once. while love next door is a bit more comedic imo, i think both are wonderful shows that resemble each other.
Both shows follow the main character whose first love disappears and then shows up again years later. In "Our Dating Sim" the main character's first love disappears and later shows up as a new employee at his office and I think "Jun and Jun" would follow a similar plot based on the synopsis.