Doesn't everybody have a time period like that? A time period where they feel like sinking into despair, no matter what anyone says or does to reassure them, it made no difference. This was especially the case for him. During that time period where he couldn't have Lila, where he had no choice but to let her stay by Austin Kiryu's side. Haruka despaired every single day. At first, Haruka believed it was a temporary measure. 'Things will not be like this for long,' eventually, he could snatch her back. Her memories of him won't vanish just like that. She loves him so much, after all.
But not only did Lila forget him completely, but she also fell in love with another guy.
When he saw her tears, Haruka reached over and cupped her cheeks, "Don't cry about it. It's all in the past."
"Uwaahhh, but, but. I'm sorry, Haruka."
"If you feel so bad, just make it up to me."
Lila blushed, "Um, now?"
"Yeah."