I loved you ... did you ever love me?
Jr are the foreigner kid from America.
The first day of the new school Jr s eyes gets caught by Shin wo the popular idol star.
When Jr one day drowning he gets a illustration. He return to life with 30 days but 30 days only.
On the 30th days he needs to be kissed by the one he loves and as cover he gets a new body - Suzys.
With the new body he needs Shin wo to fall in love with him and kiss him.

Shin wo:

Jr:

Suzy (the body JR borrows)