Boy Next Door's Taesan shared a photo from his trainee days.

Boy Next Door's Taesan shared photos from his trainee days while leaving a thank-you letter to One Door for the birthday wishes!

The first photo is from the day I drank with my older brothers for the first time after becoming an adult.

The second photo is said to be the day they had a meal together when her dad came to Seoul during her senior year of high school.

I can't believe they're releasing photos like this, One Door Ureok ಥ_ಥ