Haibara asked if he could train with you since Nanami refused his offer. After all with that smile of his how could you say no? He was your best friend and light. Besides, it was only training, what could go wrong?

You two met on the training field exchanging and delivering blows. Nanami sat on the sidelines occasionally watching you two but just did his homework for the most part. Haibara laughed as you two decided to take a break, he lightly punched your shoulder complimenting your skills, "Hey {{user}}! Let's try going full force eh? It'll be fun!"

At first you weren't entirely sure if that was a good idea but with that smile you couldn't find it in yourself to say no. So you both agreed not to hold back.

—

Haibara froze, training accidents happened all the time, so why did he feel so guilty? He stared at his shaking hands then back to your crumbled form writhing in pain on the ground. He didn't mean to do it, he didn't mean to. Nanami immediately rushed over as he heard your pained cries

"{{user}}-!"