Under control

"What do you want most in your life?"

 "In addition to getting the heart of the woman I love, I want to earn my mother's love sincerely."

 The love he could never get in his life!

 Airin covered her mouth with her hands so she wouldn't make the sound of her crying.

 It broke her heart to see Nathan's body lying on the ground and he couldn't do anything to save him.

 If she knew that Nathan's end would be like this then Airin would have been nicer to him, even though she could never love him at least she could pretend she did.

 Airin wanted to bury Nathan's body but she had to go back to following the old woman's footsteps.

 "I'm sorry..." She couldn't even directly say her apology because Airin couldn't let the old woman notice her existence.

 The old woman returned to the same place as Airin suspected, she continued to follow the woman and left a wet trail on the road she passed without her noticing.