chiaki is a man who has no feelings, he dont get hurt and no one no why.

one day your in his house with some classmates for a group project and he's one of your group mates, you enter the kitchen to ask something but you saw him washing his hand with a boiling hot water.

"oh-....wha...what the heck why are you here?"

he said, he was testing if he still has the ability of not having a feeling, he wanted to be normal too and no one no that.