Funaki Hiroya

The main character of this work.

He spent his childhood in Japan, but moved to Silicon Valley in the United States due to his parents' work. In Silicon Valley, he was known as a genius in AI programming, and instead of going to school he spent his time working in a specialized research lab. Perhaps because he has always been in contact with computers and machines, he has great difficulty socializing with others. He grew up not to show his emotions much and was somewhat argumentative and twisted.

Due to certain reasons, he returns to Japan for the first time in a long while and begins living with the older sisters of the Nonomiya family. Despite being a boy of marriageable age, he is a boy who has no interest in romance or sexual relations with the opposite sex, but when his "sisters" force themselves on him, he can't help but respond.

"I don't have any romantic feelings for anyone, and I don't need any."