"People must have their own meaning when they are born in this world, so no matter what happens, they must live strong."
"..."
"Sister, although I can't be a boy as my parents want, I can still be like a boy, take care of my parents, support myself, and even... I envy you, little brother... Boys can't cry easily!"
"... Sister, do you know that flowers have four petals?"
"Huh?"
"It's Sakura!... If Sakura can cry, boys can cry, right?"
"Huh? Yes, haha!"
"I want to make a promise with my sister..."
...