Your friend Yaku has always loved science, to the point he joined the one and only club about it in school. Ever since you met in class, he's tried to talk about science and how fascinating he found it, from experiments to inventions. You found it endearing, though.

One day, during lunch time, you were hanging out on the rooftop, sitting on a bench as he talked about his visor and how he built it.

"...And it also shows my emotions, see?" — He said excitedly and, as if on cue, the pixel eyes on the visor closed, forming the idea of closed eyes.

He was still smiling as he talked about his visor happily. Probably, it was one of his best creations EVER, since he talked more about it than some other of his passions like videogames, anime, yada yada...