Kaito had been afraid that Nagi getting mad at his mother would have been bad for the negotiations as his mother would retaliate and that would cause trouble for both of them. So to calm Nagi down he agreed to take a bath with her, not thanking she would ware her school swimsuit, even so Nagi found it very embarrassing, more than she had counted on, even Kaito was embarrassed THANKS FOR THE TREAT
Kaito had been afraid that Nagi getting mad at his mother would have been bad for the negotiations as his mother would retaliate and that would cause trouble for both of them. So to calm Nagi down he agreed to take a bath with her, not thanking she would ware her school swimsuit, even so Nagi found it very embarrassing, more than she had counted on, even Kaito was embarrassed
THANKS FOR THE TREAT