Talk:Light Novel Volume 11.5/Summary/@comment-71.140.151.125-20200328023003/@comment-32209364-20200328130801

As far as I could understand, he didn't fall in love her, in the proper meaning of the word. Remember, his objective for leaving the white room was to experience "normal" life, and romance is one of its aspects. So, he wanted to have this experience and choose Key to be his partner in it. Why did he choose her? Well, there is a few hints here and there, but seems like he saw her as someone that looked like him in some ways. In this volume you can see that, even if he doesn't really love her, he is open to that feeling. It is not a simple "experiment", he want to know and to feel love.

Well, that's my take on the case.