[UZU-012] With Hatoko's older sister, Mr./Ms., I always end up ... Afternoon on a summer day.

July. Summer day. Talk about the holidays.
Three years older. Hatoko's older sister Mr./Ms. who lives in the neighborhood.
He is also an old childhood friend. They are very close and have a sibling-like relationship.
His personality and behavior are completely different from mine. A little free-spirited. A little quirky. Very gentle.
Such an older sister Mr./Ms.. That's very comfortable.
My girlfriend always goes up to my house without permission while I'm away.
"I wonder if you're here today," he says, and he makes me happy.
And sometimes it becomes a naughty relationship.
- Includes the relationship between three older sisters who have been taking care of her since childhood Mr./Ms. for two people.