Riddhima thought that in the race of going to the room first, she had won but on going inside, she saw someone already there.
She thought it would be Ishaan but she heard Ishaan calling her from outside. It means that the person who was standing with her was someone else.
Even Ishaan was trying to open the door and was knocking at it "Who are you?"
Riddhima even tried to remove his hands but he wasn't letting her go. He snapped and all the lights got ON.
Riddhima was blank after seeing him, "Riddhima, it's me."
Then Riddhima also started calling Ishaan loudly for help, "Ishaan, Ishaan..."
He said, "Yes, Riddhima. What happened? Open the door."
But she couldn't as he wasn't leaving her, "I can't. He isn't letting me."
Ishaan also didn't know who was with Riddhima in the room, "Who is not letting you? Is there someone else with you in the room?"