Sis allows the two to stay with her in exchange for working in the fields with the other children .
Shu has to keep Lala - Ru 's identity a secret from Sis to avoid any trouble that could arise .
Sis allows the two to stay with Lala - Ru in exchange for working in the fields with the other children .
Shu has to keep Lala - Ru 's identity a secret from Sis to avoid any trouble that could arise .