Sunjeongi Eottaeseoyo!

Ahn Jaeha, a national judo athlete, is invited as a temp instructor to Lim Seojin’s training center. Despite Seojin’s warm demeanor, Jaeha’s cold and stoic attitude creates an awkward tension between them. On his way home, Seojin unexpectedly runs into Jaeha, and in a spur-of-the-moment decision, they end up drinking together. But when Seojin wakes up from his drunken stupor, he finds Jaeha calling his name…while masturbating right in front of him!! (Source: Lezhin) Note: Includes four extra chapters.