With 4 minutes and 30 seconds having passed—just before the five-minute mark—Akasaka seized the time and put the Ten-Year Bazooka over Shiina Mahane's head from ten years later once more.
There was something he wanted to confirm.
The next moment.
Another cloud of smoke spread out.
Twenty-year-old Shiina Mahane appeared before Akasaka.
Akasaka's main purpose was to see whether twenty-year-old Shiina Mahane had been cast from the same mold as Shiina Mahiru, so she could pass for her.
Sure enough, their appearances were mostly identical. The only difference was that streak of black hair on top of her head.
That was simple.
At worst, he could use scissors to cut off that black streak, or dye it the same flaxen color with hair dye.
That way, no one would spot any problems.
Elsewhere.
Ten years later.
A cloud of smoke rose inside the Vongola Family leader's office.
Mahiru had been sitting in the office, waiting early.
She knew full well that the Ten-Year Bazooka only lasted five minutes. Once those five minutes were up, the person would return to where they had originally been.
So she had kept waiting.
The moment Shiina Mahane returned from ten years later, she hurriedly handed the envelope to her mother.
"Mom! This is a letter Dad sent you from ten years ago."
Mahiru took it and opened it.
Meanwhile, little Shiina Mahane plopped back down onto the black leather sofa, took snacks from beneath the drawer, and started tearing open the packages to eat.
The more Mahiru read, the tighter her brows furrowed. The more she read, the stranger her expression became.
She looked at Shiina Mahane, who was munching on snacks nearby, and silently shook her head.
"This child's good days... are over..."
The envelope was conspicuously labeled: [Train this child hard! Train