Who is the Culprit?

'''Introduction to the Work: #MultipleGongsOneShou #IdolStory #LeaderShou #MemberGongs #4Gongs1Shou #PromiscuousGroup(?) #ComicGag #SoWhoIsTheCulprit? The hottest idol group in South Korea, Killer B, faces a crisis concerning its leader, Jay. It's that he lost his custom-made height-increasing insoles, the very source of his pride! In the misery of instantly becoming 4cm shorter, Jay sets out to find the culprit who stole his insoles. Suspect 1. The self-proclaimed and universally acknowledged Jay fanatic, Joo Min-hyuk! Suspects 2 & 3. The twins Dokgo-hoon and Dokgo-min, who have been eyeing the insoles with envy! Suspect 4. The prickly genius, the team's maknae Lee Tae-hyung! But som...