Manga by author Yogurong - Status ongoing

"Doctor, your shots are really unpleasant." Lee Inwoo, a member of the private mercenary group, "SOT," approaches an ordinary doctor, Kang Dowoon, to retrieve the formula for a certain drug. As Inwoo gets closer to uncovering Dowoon's secrets, he finds himself increasingly burdened by guilt for betraying him.

Original Webtoon:R19: BomtoonR15: Bomtoon