After quitting his job, Lee Jeongwon went back to his hometown where he meets Kwon Dojin, a college student who ran away from home.. The two completely different people meet & had worst first impressions. Jeong-won, who thought he would never see them again, runs into Dojin who had nowhere to go, suggests that they live together under the pretext of teaching him how to swim. Jeong-won, who had been trying to get by, gradually comes to rely on Do-jin, who is affectionate and mature, unlike his first impression.

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