K-Drama actor Kim Seon Ho is putting everyone through some serious “Second Lead Syndrome” right now…

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Kim Seon Ho in “Start-Up”. | tvN

… with his charming role of “Good Boy” Han Ji Pyeong in tvN‘s Netflix original series Start-Up.

That said, his fans have since dug up a July 2020 episode of 2 Days & 1 Night — in which Kim Seon Ho once showed off his physique in a skin-tight wet suit!

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“2 Days & 1 Night” season 4 members. | KBS

In this resurfaced episode, Kim Seon Ho went underwater for seafood…

… absolutely slaying this diver look, even with that silly tiger swim-cap.

Fans got to catch some good looks at his muscular build…

… that no suit could possibly hide.

Kim Seon Ho fans are wilding on the internet about this recently-found gem of a video…

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… and honestly, same. Who’s on “Team Good Boy” with us?

Watch Kim Seon Ho getting ready to dive (deep into our hearts) below.