Six very different boys gather at a cottage in the mountains to choose their first date based on a token, but there are awkward matches. During a secret phone call at night, one of the members makes an unpredictable phone call...

The night's call ends in a surprise, and the next day's date, the introverted Bobo talks about his past. Meanwhile, a mysterious man appears on the date between Eri and Guan-Yu.

After a dinner conversation about first times and first loves, the new members of the group open up another more intimate topic, and for the first time, the members get into an argument? Before the excitement subsides, it's time for the second night of secret phone calls.