Class-E, The Experiments

On a fateful day, two souls entered the world, each destined for misfortune from the moment they took their first breath. One was born in Japan, the other in the distant land of Latvia. Both would be drawn into the depths of questionable experiments, and in time, their lives would inevitably become intertwined. That much was certain.

In this fanfiction, Ayanokōji will be less desperate for 'friends' while also having small locked away trauma here and there from the white room resulting in some flashbacks and such, other then that his personality won't change much. And before enrolling to school, he decides to also read a little bit of social behavior books. Something he probably didn't do in the LN, Anime or Manga.
(Also, when it says he smiles, he doesn't, he just thinks he does.)