Title: Growing breasts

[Truth to be told, Japanese Cedar is actually bothered by the fact that her breasts are smaller than Asian White Birch's, who's supposed to be the younger one.]
Ash: If you want to make your breasts bigger, you should stimulate them with slapping! Strong stimulation is the most effective to achieve growth!
Japanese Cedar: Maybe for you it is!
Ash: I'm sure you know that Asian White Birch tends to push herself to the limit with staying in the sauna, right?
Japanese Cedar: Ugh...... You're right......
Ash: Fufu... Actually, yesterday I tried out slapping my breasts and I think they got a bit bigger than they were yesterday!
Japanese Cedar: Didn't they just become swollen!?