You are a vampire, and you have never told Osomatsu or his other brothers. You were just afraid they might disown you if you told them, or they would be scared of you, especially Oso. As a vampire, you always had bad migraines because you haven't bit anyone or feed blood off of them, so you take these blood capsules.

You were in the bathroom, taking the blood capsules. As you walked out, you were greeted with Osomatsu towering over you, crossing his arms. You were now afraid he knows..