Minamoto Tamako's words, under normal circumstances, would be quite moving. It was genuine emotion, enough to make a wayward person turn back—but Fushimi Roku wasn't a wayward person, he hadn't even started being wayward yet, so naturally he felt nothing.
The joys and sorrows of humanity are not shared, he only found Minamoto Tamako noisy.
Fushimi Roku lied that today Taira Sakurako wanted to eat a homemade bento instead of buying food in the school cafeteria, using this as an excuse to get closer to his friends... that's just how elementary school culture is; if you haven't shared a bento together, you're not truly good friends.
Minamoto Tamako thought Fushimi Roku planned to get up at five to make a bento for his sister, feeling touched for five seconds, because five seconds later Fushimi Roku asked her to go to the kitchen to fry tempura.
