Yes, it looks like he did. What i want to know is what age Seungtaek was when he was sent the pic. People see "middle schooler" and think he was in middle school, but asian schools are different. He might've been in high school. Still not great, but much better than pedophilia, ages 13-... What matters is the mental maturity of the person.
http://www.mangago.zone/read-manga/someone_else_s_bl_manhwa/mdx/iur_chapter-21/pg-1/ it was this chapter he was in the last year of middle school
Not cool...
Ahhh did that uncle guy send a photo of his dick??? I'm so confused xD