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Yoon Hee lives with her teenage daughter Sae Bom. On a winter day, Yoon Hee receives a letter from Otaru, Japan. Sae Bom accidentally reads the letter and learns about her mother's first love, which she never spoke about before. Hiding the fact that she knows about Yoon Hee's first love, Sae Bom proposes that they travel to Otaru, Japan together. There, the mother and daughter enjoy their time together. Yoon Hee, believing that she might meet her first love again, feels her heart fluttering.

Aiba Mion, 25, came up to Tokyo from the countryside. After graduating from university, she scored a full-time post at a Tokyo apparel company and was assigned to be a shop employee. Mion’s goal is to be in Tokyo’s hippest...

A competition/survival show to produce a boy group. It starts out with 16 contestants and two teams. The mentors each choose their members based off of their debut performances, and then form pairs within the team. Therefore each team has four pairs of two, and eventually each pair is put up against the other team. There is also three judges who score the performances, and they are quite strict but are very professional, providing rationale to their opinions. At the end of each episode, the teams get ranked, and after some rounds, members get eliminated and the rest gets reorganized to better suit the change. The pairs soon turn into groups of three and so on. The show continues with many powerful performances, revealing significant improvement of the contestants.

With old faces back on the team, the detectives investigate a series of bewildering cases that seem to be linked to a shady organization.