Hiro from a young age had to start taking care of his mother due to her condition, so he looked to help her more. Much of this comes from the teachings he got from his mother when he was younger. Hiro since childhood has always loved cooking. Keitaro being a charismatic & friendly person, she most likely found him to be a nice young boy as well. Hiro's mother takes a great liking to Keitaro being that Hiro always seemed happy whenever he was around. When the two were younger, Keitaro would come over to Hiro's place often, and the two were noted to have done gardening with one another while Hiro’s mother was around.
Hiro's childhood was focused greatly around his best friend, Keitaro, and mother, Hina Akiba, who is known to be prone to illness and known to have an unspecified condition. 5.2 Day 8-33 ~ Determines Perfect Ending.
