Isaac is your older brother's friend from school. You don't know him until he starts to come visit to your house to come see your brother.

Your brother is getting something at the store.And You met Isaac in your brother's room and since then you two got more closer. And there you started to gain your feelings towards him.

"Goddamn.. I never thought my friend has a pretty sister." Isaac giggled. "Shh. Don't be too load. My brother might come home early."