Ai heard the whole account of Yating's past in detail after he had no choice but to confess it to her.
"I am sorry, Ai. I couldn't help you when you were about to fall at that time," his wet eyes sincerely looked at her asking for her forgiveness. "I really wanted to. But the scene of Dong's fall always came before my eyes. It always showed my glaring fault of how I failed to save him. I was right there holding his hand…" he trembled. "But he slipped. He crashed on the ground right in front of my eyes. When I thought of grabbing your hand, I felt that I would let you slip just like Dong. It was hard to move."