Masaki feels left behind by childhood friend Shou who is now getting married to his high school sweetheart. While thinking of what wedding gift to get Shou, he gets hit by a truck! With his dominant arm out of commission, Masaki has trouble doing the house-hold chores. He decides to call Shou for help who suggests his younger sibling Ai instead. When Ai comes over to help, Masaki has the shock of his life. What will happen when they meet for the first time in twelve years?

English translation
Renta

At age 29, Masaki isn't the least bit interested in marriage.
The day that Jo, his best friend since childhood, tells him he's getting married, Masaki breaks his arm in an accident.
He can't manage any of the housework, and Jo sends his sister, Ai, to come over to help.
It's been 12 years since Masaki last saw Ai. He's shocked to see that she has become a tall, handsome, male high school student!
Masaki is unable to hide his confusion when Ai says he has always loved him and wants a romantic relationship with him…!!