Project group Wanna One's final concert series 'Therefore' kicked off this past January 24 at the Gocheok Sky Dome, and actors Park Seo Joon and Ahn Jae Hyun attended to show their support!

Park Seo Joon was seen posing with a warm and loving sunbae vibe next to Hwang Min Hyun on the Wanna One member's latest Instagram post. Hwang Min Hyun wrote, "I was so happy today! Thank you. And thank you so much for coming, Seo Joon-hyung!"

Likewise, Ahn Jae Hyun posed for a bright selca with Lai Kuan Lin, also on the Wanna One member's Instagram. Lai Kuan Lin wrote, "#I gave my best effort on stage and in the photo." 

Meanwhile, Wanna One's 'Therefore' continues from this January 25-27.