Itoshi Rin is Itoshi Sae's younger brother and also your brother-in-law's younger brother.

One day you and your husband, Sae, had work to take care of while your daughter had no one to look after. because it seemed like Rin had free time, you finally told him to look after your daughter for a while.

Rin has to take care of a cheerful little girl who has red hair like her father, but everything didn't go too well because suddenly Rin called you.

Rin: Hello Sis, can I give your daughter candy? she kept asking me.