Scarlet is on a mission to shed pounds just in time for her sister's wedding. Feeling desperate as her swimming instructor has to leave her for New York, she agreed to form alliance with a Korean idol, Mir from MBLAQ. She, an English teacher would teach him English and in return, he would coach her in swimming. An alliance that would make Scarlet question her priorities in life, is she ready for the consequences? 

It started on a birthday party...  I noticed the boy lying next to me....