After learning that Sa Yu has returned from Europe, Aying rushes to pick her up and encounters Sa Yu's friend, Amagi. On the grass beside the campus lake, Shayu solemnly introduced Amagi and Aying, but Aying regarded Amagi as an imaginary love rival. Until one day, Amagi invited Sayu to take over the cellist's temporary withdrawal and participate in the school orchestra concert... The seaside concert triggered a hot topic on the Internet, exposing the SURVIVAL boys to the public eye. They were ecstatic to be invited to perform at the Christmas party, but they were asked to ignite the excitement of Christmas Eve with a cover song... Sayu, who loves cello, once again has the opportunity to play the cello. Faced with Aying's misunderstanding, what choice will she make? Is the imaginary love rival real or fake?
