"Oh, so you admit that when you were sleeping with me, you were thinking of her, huh?"
Hmm, she didn't deny it, which proves that when he sought her out back then, it wasn't just on a whim. It was because they had already planted each other in their hearts long before they became strangers!
It also proves that during those years, that pure yearning wasn't just one-sided love on her part. In fact, with that one glance, the hurried goodbye, she was deeply buried in his heart, and so in the years that followed, he never forgot her!
It wasn't until they met again as strangers that they went through a completely unfamiliar encounter, parted ways, and then reunited. After going in circles, they finally ended up together!