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Realtor Jung-tae(Byun Yo-han)'s hobby is sneaking into strangers' homes and peeping into their lives. One day, an unfamiliar face in the area grabs his attention-an Instagram star, So-ra(Shin Hae-sun).

Miraculously, So-ra leaves her house key at Jung-tae's agency and Jung-tae visits her home whenever he can, thrilled and excited.